User blog comment:B214/Question and Answers 6/@comment-61.94.131.116-20170102040146/@comment-29963364-20170106025327

 Chaos Break 


 * A "doping" ritual using the blood of the Original Satans.


 * Using this ritual activates the Chaos Drive, which forces the user to fuse/merge with their Sacred Gear and/or Holy/Demon Swords into a monstrous form. The first use causes severe damage to the user's mind and body, and every use after that shortens their life-span.

 Abyss-Side Balance Breaker 


 * A type of Balance Breaker that is an "evolution" of an already existing one. It is achieved by the user training & improving themselves and their Sacred Gear to the point that they enter the "Abyss" of unknown possibilities.


 * Currently, the only known case of an Abyss-Side Balance Breaker is Tobio Ikuse. He achieved it by training to improve & polish his already unlocked BB, until they "became one." Similar to how master swordsmen figuratively "become one" with their swords, Tobio literally fused/merged with his Balance Breaker.