Sans, A Underated Hero

Wither, Hexproof
Prevent all damage that would be dealt to Sans
Whenever Sans blocks a creature, put {x} -1/-1 counters on that creature where {x} is its converted mana cost plus 2
At the beginning of each end step put a Gaster blaster artifact token onto the battlefield with sacrifice this artifact: Deal 3 damage to target creature or player
Do you wanna have a bad time - Sans