Bad Time

Equip only to Sans, Underground Arbiter.
Equipped creature gets +10/+10, Indestructible,
and "At the beginning of combat on your turn,
create three 5/1 Gaster Blaster artifact creature
tokens with flying and haste. At the beginning
of your end step, sacrifice them and deal damage
equal to their power to target permanent.
"You're gonna have a bad time."