After The Undertaker won the WWF Championship at WrestleMania 13, Paul Bearer attempted to reunite with him the following night on Monday night RAW, the two having been engaged in a long period of mutual hostility ever since Bearer's Summer Slam 96' betrayal of The Undertaker. When the Undertaker rejected the offer, Bearer along with his then-protege and arch-enemy of the Undertaker, Mankind, launched a fireball into the face of The Undertaker. This culminated at April's In Your House 14: Revenge of the 'Taker event when The Undertaker returned the favor, launching a fireball of his own into the face of his former manager, who had unsuccessfully attempted to assist Mankind to victory in their WWF Championship match. On the May 12 episode of Raw, Foley reintroduced Bearer, whose face was heavily bandaged due to the burns The Undertaker had inflicted upon him. Bearer again made efforts to get Undertaker to be his protege, this time around, however, threatening the exposure of a fire-related secret, The Undertaker's "deepest, darkest secret." During the cryptic interview, Bearer likened the fire that had burned his face at "Revenge of the Taker" to a fire that had occurred during The Undertaker's childhood (the secret).
The secret in question suggested that Bearer had a traumatic past with The Undertaker, long preceding Brother Love's joining the two as manager and protege in January 1991. The secret was as follows: The Undertaker's mother had an affair with Bearer and as a result, gave birth to a younger half-brother of The Undertaker, named Kane. This came to light when Bearer informed Jerry Lawler on Monday night Raw, at a point in which he thought cameras had stopped rolling for a commercial but were still on. Growing up, Undertaker lived in a funeral home with his family. According to the secret, The Undertaker committed arson/murder, burning down the family funeral home, in the process, killing his parents and scarring his half-brother's face. Bearer, who survived the fire, hid Kane in a mental asylum during the rest of Kane's youth into adulthood. In the meantime, Bearer went on to form an alliance with The Undertaker while in the World Wrestling Federation, standing by his side for six years before eventually betraying him at SummerSlam 96'.
The Undertaker thought his younger half-brother, Bearer's illegitimate son, had been dead for years, that is, until Bearer introduced Kane at Badd Blood: In Your House on October 5, 1997, costing The Undertaker the victory in the first-ever Hell in a Cell match with Shawn Michaels. In keeping with the notion that Kane had been scarred by the fire, the character wore a mask, sported long hair, and wore red and black ring attire that almost covered his entire body.
Kane wanted to take out all of his pent-up and vindictive aggression out on his "brother" but Undertaker refused to fight his own "flesh and blood." Kane attacked and embarrassed The Undertaker on several occasions but Undertaker still refused to fight. After Kane surprisingly saved Undertaker from an attack by D-Generation X, the duo had a brief partnership which ended after Kane betrayed Undertaker by costing Undertaker a casket match against WWF Champion Shawn Michaels for the WWF Championship at Royal Rumble 1998. He chokeslammed Undertaker into the casket, which helped in Michaels getting the win. After the match, Kane and Paul Bearer locked Undertaker in the casket and set it ablaze. The two continued to feud. Undertaker returned later on an episode of Raw is War and changed his mind and agreed to fight Kane. This led to a match at WrestleMania XIV, which Undertaker won after hitting him with three tombstone piledrivers. They met each other in the first-ever Inferno match at Unforgiven: In Your House, which again Undertaker won by burning his brother. On June 1, 1998 edition of Raw is War, they wrestled in a number one contender's match for the WWF Championship, which Kane won with help from Mankind.
On an episode of Raw is War, Kane attacked WWF Champion Steve Austin. Austin blamed Vince McMahon for setting up the attack. McMahon denied it and blamed the attack on The Undertaker. Undertaker denied setting up the attack and teamed up with Stone Cold to face Kane and Mankind in the first ever tag-team Hell in a Cell match. The match ended in no-contest as the referee failed to restore order in the match. At King of the Ring 1998, Kane and Austin faced each other in a First Blood match for Austin's WWF Championship. The stipulation was that if Kane lost, he would set himself on fire. The referee was knocked out and Undertaker interfered in the match with a steel chair and came to hit Kane with the chair but accidentally nailed Austin with the chair, which helped Kane to win the championship. Undertaker formed a partnership with Kane after he later revealed that he attacked Austin because he didn't want his "brother" to be burned. Undertaker started a rivalry with Stone Cold, who later regained the WWF title from Kane while Kane and Mankind won the WWF Tag Team Championship. At Fully Loaded: In Your House, the duo were forced to team up together and defeat Kane and Mankind to win the titles.
They dropped the titles back to Kane and Mankind in a fatal four way tag team elimination match, also involving New Age Outlaws (Billy Gunn and Road Dogg) and Nation of Domination (The Rock and Owen Hart) on an edition of Raw in August. This move occurred after they couldn't patch up with each other. This led to a title match at SummerSlam, with Undertaker facing Austin for the WWF title. At that event, he and Kane became a team known as the "Brothers of Destruction" after Kane abandoned Mankind during their Tag Team title defense against New Age Outlaws and instead interfered in the Undertaker versus Austin match when he tried to help his "brother" but Undertaker sent him back. As a result, Austin nailed the Stone Cold Stunner for a victory. At Breakdown: In Your House, Undertaker, Kane and Austin faced each other in a triple threat match for Austin's WWF title. Undertaker and Kane could only pin Austin so they pinned Austin at the same time.
Vince McMahon vacated the title since there was no clear winner. At Judgment Day: In Your House, Kane and Undertaker faced each other for the vacant title with Austin as the special referee. Undertaker turned heel during the match as he betrayed Kane for Paul Bearer, thus turning Kane in to a tweener. The match ended in a no-contest as Austin attacked both men and declared himself the winner. Shorty after, Undertaker admitted to setting the fire that scarred Kane's face when they were children. Their feud continued. Undertaker faced Austin at Rock Bottom: In Your House in a Buried Alive Match. During the match Kane interfered and attacked Undertaker and helped Austin get the win. They separated from each other and went on their own. In early 1999, with Kane now a member of The Corporation and Undertaker now the leader of the Ministry of Darkness, they faced each other in their second Inferno match. Undertaker once again got the win. In the summer of 1999, The Undertaker's Ministry of Darkness was beginning to fade away, while Kane was in a tag team with X-Pac whom he won the WWF Tag Team Championship twice with. The Undertaker attempted to reunite the team, but Kane made the ultimate decision to remain in his team with X-Pac, when he found out The Undertaker was only using him. Shortly after that The Undertaker would form a tag team with The Big Show with whom he won the WWF Tag Team Championship twice with, to feud with Kane and X-Pac. The Undertaker eventually was injured in the fall of 1999, with Kane going his own way again. They reunited again in the summer of 2000 (it should be noted that at this time, Undertaker had taken on the biker persona instead of the satanic character he had portrayed previously), and challenged Tag Team Champions Edge and Christian for the tag titles on an edition of Raw is War but they were disqualified, so they didn't win the titles. On August 14 edition of Raw is War, Undertaker faced Chris Benoit in a match, where Kane turned on Undertaker by chokeslamming him through the ring, and the two feuded with each other again. This culminated in a match at SummerSlam 2000, which resulted in a no contest when Undertaker unmasked Kane, causing him to flee the ring.
At Royal Rumble 2001, Undertaker and Kane teamed up eliminating most of the field in the Royal Rumble match. Kane entered number 6 and finished second eliminating 11 wrestlers. Undertaker came in at number 25 and came sixth after being eliminated by Rikishi. The two reunited later that same month and on February 1, 2001 edition of SmackDown!, they defeated Rikishi and Haku in a brutal First Blood match. They got a shot at the tag titles at No Way Out 2001, facing the champions Dudley Boyz (Bubba Ray and D-Von) and Edge and Christian in a tables match. The Brothers of Destruction dominated the entire match, and nearly had the match won until Rikishi and Haku interfered. At WrestleMania X-Seven, Kane defeated Raven and Big Show to win the WWF Hardcore Championship and The Undertaker defeated Triple H.
The Undertaker and Kane started focusing on then Intercontinental Champion Triple H, who would soon make a surprise alliance with WWF Champion Stone Cold Steve Austin known as Two-Man Power Trip. They were granted an opportunity to face Steve Austin and Triple H at Backlash, if they could defeat Edge and Christian in a no-disqualification match for the titles. On April 19 edition of SmackDown!, the Undertaker and Kane defeated Edge and Christian to win their first WWF Tag Team Championship as a team, despite interference from Austin and Triple H. As a result of winning the titles, Brothers of Destruction earned the right to face Steve Austin and Triple H. At Backlash 2001, all major titles were on the line but despite that, Triple H pinned Kane after using a sledgehammer, thus making him and Austin the new WWF Tag Team Champions as well as the WWF Champion (for Austin) and the WWF Intercontinental Champion (for Triple H). With Kane injured, The Undertaker began targeting Steve Austin and his WWF Championship. On an edition of Raw is War, the Undertaker was told by police officers that his wife Sara had been involved in a car accident. The Undertaker arrived home, only to find out that it was all a set-up by Austin. At Judgment Day 2001, Kane defeated Triple H to win the WWF Intercontinental Championship in a chain match, despite interference from Steve Austin. Later that night, The Undertaker dominated his WWF Championship match with Austin. Triple H interfered once more, however, using his sledgehammer, allowing Austin to pin the Undertaker and retain his championship.
Diamond Dallas Page was the next person to get in the Undertaker's way. Page wanted to become a big star, just like the Undertaker, and so he started a feud with him, taking the Undertaker's slogan, "I'll make you famous" quite literally. The basis of this feud involved Page stalking the Undertaker's wife Sara. On the August 9 episode of SmackDown!, they defeated the Natural Born Thrillers (Chuck Palumbo and Sean O'Haire) to win the World Tag Team Championship. At SummerSlam 2001, the Undertaker and Kane defeated Diamond Dallas Page and Chris Kanyon in a steel cage match to win their second WWF Tag Team Championship.
Brothers of Destruction began a feud with KroniK (Brian Adams and Bryan Clark), who were brought to WWF by Stevie Richards. On September 17 edition of Raw is War, Kane and Undertaker lost the WWF tag titles to Dudley Boyz after KroniK interfered. At Unforgiven 2001, they successfully defended their titles against KroniK before losing them to Booker T and Test on the following edition of SmackDown!. They continued on as a team representing the WWF side through onto the end of the Alliance Invasion angle, including their participation at InVasion and Survivor Series 2001 after which the Undertaker immediately turned heel once more and the two did not interact with each other for a long while.
The duo first appeared together in 2002's WWE Draft, standing right next to each other when Undertaker was drafted to Raw. The duo next appeared together during the first few moments of No Mercy 2002 as they both had title matches that night. They next teamed up again unofficially at the Royal Rumble 2003, but the Undertaker turned on Kane during the Royal Rumble match and eliminated him. Later that year at the Survivor Series 2003, an unmasked and heel Kane interfered in the Buried Alive match between Undertaker and Vince McMahon, costing Undertaker the match. Kane would go on to say that the Undertaker was buried forever. The two would end the feud with a match at WrestleMania XX in 2004, in which the Undertaker returned to his Deadman character, and defeated his half-brother Kane.
The brothers had a short run-in with each other in 2005. At the Royal Rumble 2005, Undertaker was in a scheduled match against then-heel Heidenreich in a Casket Match. Before the match, Gene Snitsky, who was in a feud with the face gimmick Kane, told Heidenreich he would help him that night. Due to the interference, Heidenreich was positioned to win. However, when the casket was asked to be opened, Kane emerged from the casket and battled Snitsky out of the arena, letting Undertaker defeat Heidenreich. Original plans were for this to lead to a tag team match at WrestleMania 21, but the plans were scrapped when The Undertaker instead decided to take on Randy Orton. They did team up during house shows taking on Snitsky and Heidenreich.
The return of the Brothers of Destruction was announced on October 27, 2006 edition of SmackDown!. Montel Vontavious Porter interfered with Kane's match against Mr. Kennedy, helping Kennedy beat down on him before the lights went out and the Undertaker's music came on. When the lights came back on Kane was gone, nowhere to be found. As a result of the interference, general manager Theodore Long scheduled a tag team match: The Brothers of Destruction vs Kennedy and MVP. The next week on SmackDown!, the Brothers of Destruction reunited for the first time as a tag team in five years and gathered three wins over MVP and Mr Kennedy in that one night. The first win was made by countout when MVP and Mr. Kennedy refused to re-enter the ring, at which point General Manager Theodore Long came out and restarted the match with no countouts. Kennedy then delivered a blatant low blow to Kane in front of the referee, getting disqualified. Long came out again, and restarted the match with no disqualifications or countouts. Finally, the brothers hit simultaneous chokeslams, and Undertaker finished with a Tombstone piledriver to Mr. Kennedy.
The brothers continued to feud with their individual opponents before reuniting for a rematch on the last SmackDown! before Armageddon. This time, the match would go to a double disqualification as Kennedy threatened to run over Kane with a hearse parked ringside. The Undertaker, who had run off MVP, emerged in the passenger seat as his gong tolled and the lights went out, thus scaring Kennedy out of the vehicle. At Armageddon, Undertaker defeated Kennedy in a Last Ride match, which was why the hearse had been at ringside for the last two weeks, and Kane defeated MVP in an inferno match. The next week on SmackDown!, the Brothers would reunite once again, defeating King Booker and Finlay, before parting ways as Undertaker successfully pursued the World Heavyweight Championship at WrestleMania 23.
On October 12, 2007 edition of SmackDown!, the Brothers of Destruction reunited for the first time in 2007, defeating WWE Tag Team Champions MVP and Matt Hardy in a non-title match. The Brothers of Destruction reunited for the first time in 2008 on the February 1, 2008 episode of SmackDown, defeating Big Daddy V and Mark Henry by submission. At WrestleMania XXIV, both brothers became world champions: Kane winning the ECW Championship, and Undertaker winning the World Heavyweight Championship.
On the April 4, 2008 edition of SmackDown, Undertaker and Kane faced each other for the first time since WrestleMania XX. The match finished with no decision as "La Familia" (Edge, Chavo Guerrero, and Curt Hawkins and Zack Ryder) interfered. In tandem, however, Kane and Undertaker delivered a Chokeslam and Tombstone Piledriver to Chavo and Edge respectively. The Brothers of Destruction also made an appearance when ECW traveled to London, England on April 15, 2008, facing current WWE Tag Team Champions John Morrison and The Miz who also fell victim to tandem chokeslams. On the April 21, 2008 edition of Raw, the Brothers of Destruction teamed with John Cena and Triple H to take on the team of John Bradshaw Layfield, Chavo Guerrero, and the one night only reunion of Rated-RKO (Edge and Randy Orton) in a losing effort, after Edge hit Kane with a Spear.
On the November 13, 2009 episode of SmackDown, after his match with Chris Jericho which was ended after interference from Jericho's partner The Big Show, Kane came to the aid of his brother to chase off "Jeri-Show". The Brothers of Destruction would reunite on the November 20th episode to face the tag team of Chris Jericho and The Big Show. The match ended in a No Contest, and Jericho subsequently fled the ring during the match after pilfering the Undertaker's championship belt. On the June 4 edition of SmackDown, SmackDown General Manager Theodore Long announced that the Undertaker was found in a vegetative state by his brother Kane. He vowed to find out the identity of The Undertaker's attacker, and for weeks he accused and interrogated other superstars. At Money in the Bank, Kane won the Money In The Bank ladder match to win a World Heavyweight Championship title shot any time, anywhere. Later that night, Kane chased off one of The Undertaker's potential attackers, Jack Swagger, who was attacking Rey Mysterio. Kane then returned to successfully cash in his Money In The Bank contract to win the World Heavyweight Championship. Kane would then claim that Rey Mysterio was The Undertaker's attacker, although Mysterio denied it. At SummerSlam, Kane defended his championship against Mysterio, during which The Undertaker returned to confront Kane and Rey Mysterio. The Undertaker, however, was tombstoned by Kane, who was revealed to be the Undertaker's attacker all along. This resulted in a feud between the two.
Kane and Undertaker met at Night of Champions, which Undertaker lost. With Kane seeming to have grown stronger than his older brother, The Undertaker was boosted by the return of his former manager, and Kane's father, Paul Bearer (who hadn't been seen for many years, since June 2004 when The Undertaker betrayed him by drowning him in a crypt of cement). With Bearer by The Undertaker's side like old times, the two squared off again at the Hell in a Cell pay-per-view in a Hell in a Cell match for the World Heavyweight Championship. Paul Bearer, however, betrayed The Undertaker by blinding him with the urn, allowing Kane to chokeslam him for the victory. The feud culminated with a Buried Alive match at Bragging Rights, in which The Undertaker lost again due to interference by The Nexus, allowing Kane to bury the Undertaker alive, possibly evening a longtime score for The Undertaker's initial ablaze of his brother as children. After the event, The Undertaker went just to appear on WWE, but only sporadically. Kane continued to be World Heavyweight Champion, until he lost his title to Edge at TLC. During this feud, he was seemingly making failed attempts at defending his father from Edge; though in April 2012, Bearer returned for a brief stint as a part of Kane's ongoing feud with Randy Orton. Bearer was kidnapped by Orton and then stuck in a storage freezer while strapped to a wheelchair. Kane later came for Bearer, only to betray him by rolling him back into the freezer while stating, "I'm saving you...from me."
On July 23, 2012 during Raw 1000, the brothers reunited against Jinder Mahal, Curt Hawkins, Tyler Reks, Hunico, Camacho and Drew McIntyre when they were planning to attack Kane. This led to the return of The Undertaker, who assisted Kane in fighting off the six attackers (hinting that Taker forgave Kane for his betrayal), reuniting The Brothers of Destruction. They cleared the ring before delivering simultaneous chokeslams and Tombstone Piledrivers to Hawkins and Hunico. After that the brothers did their signature pose.
Undertaker and Kane were once again reunited on the March 11, 2013 episode of Raw following the real-life death of Paul Bearer. As Undertaker was attempting to pay tribute to Bearer, he was interrupted by his WrestleMania 29 opponent CM Punk. This caused an irate Kane to attack CM Punk, leading to a match between the two later in the night. Kane was victorious in the match thanks to interference from The Undertaker and the two then once again tried to pay tribute to Bearer, however they were again interrupted by Punk who attacked Kane with Bearer's urn and then left the arena with it, at WrestleMania both Undertaker and Kane were victorious, extending The Streak to 21-0 and retaining the Tag Team Championship respectively.
The brothers reunited once again the night following WrestleMania 29 on the April 8, 2013, edition of Raw, when Kane and his Team Hell No tag partner Daniel Bryan rushed to the Undertaker's aid as he was about to be attacked by The Shield. The Shield members then exited, performing their signature pose. Two weeks later on the April 22 edition of Raw, there was a six-man tag match: The Brothers Of Destruction/Team Hell No (Undertaker, Kane, and Daniel Bryan) vs. The Shield (Dean Ambrose, Seth Rollins, and Roman Reigns). The Shield emerged victorious in the encounter, able to separate Bryan from his teammates.
On October 17, 2015, at a house show in Mérida, Mexico, The Brothers of Destruction reunited to take on Luke Harper and Braun Strowman of The Wyatt Family in a tag-team match, which they won after Harper tapped out to The Undertaker's Hell's Gate. At Hell in a Cell, The Wyatt Family attacked The Undertaker after his Hell in a Cell match with Brock Lesnar, ultimately carrying Undertaker to the back after beating him down. On the following episode of Raw, after Bray Wyatt explained his actions, Kane came out to exact revenge, however was met with the same fate as his brother, when the rest of the Wyatts appeared. On the November 9 edition of Raw, The Brothers of Destruction returned and attacked The Wyatt Family. The Undertaker's body of dark angels, dubbed "The Druids", returned on the November 16 edition of Raw, however Wyatt would take control of The Druids and have them turn against The Brothers of Destruction. At Survivor Series, The Brothers of Destruction defeated Wyatt and Harper in a tag team match.