With W.D. Gaster having fallen Victim to the endless rampage of the human, only one more beast stood in the way between them and the power to annihilate everything, the truly MAD King would not allow them to pass.

(Basically this is after hardmode Genocide in a timeline where Gaster is the final Hardmode Genocide boss)

Character is me!

Art by the lovely: THANK YOU SOOO MUCH!