This sans is called Oblivion Sans. At first he is in his canon form, acting lazy and playful (Like the one from Undertale). However, he secretly calculates offenses, mistakes, and how each character behaves, highlighting failures or struggles. This is while the Canon side is secretly evil, but characters do not know this. When he had calculated enough, he transforms into a horrifying and mentally taxing monster, as one shot from a gaster blaster can completely obliterate his victims. He uses puns and lists their offenses as an evil judge. He mentally scares the opponent through chilling lines and cruel puns. Intentional near misses lists him as someone to be feared. He can also manipulate the environment around him.
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