Sunder used to be a world-class mnemosurgeon. Like many with his skills, Sunder suffered for his profession, which he considered akin to "walking with death," unable to stop despite knowing that the "fatal injection" was getting closer and closer. Eventually, he went insane and embarked on a killing spree, and became known as the Tetrahex Ripper. While imprisoned, Sunder had evolved his skills to the next level, developing the ability to perform "remote mnemosurgery", able to probe a 'bot's mind