In Underverse, he was portrayed as a destructive force, targeting others. Presently, his primary objective is to locate XGaster and exact his revenge by destroying him. Fatal error sans abilitys consist of Fatal blasters. Fatal bones that can be red, green, or blue. red strings that can restrain and they come out his fingertips. has the ability to copy code and summon it as his own. and he can travel through universes.