milling juggernaut

Sacrifice a creature: Target player mills cards equal to the sacrificed creature's power.

Enchant creature Enchanted creature has ": Create a token that's a copy of this creature, except it has haste. Exile that token at the beginning of the next end step."

This creature attacks each combat if able. This creature doesn't untap during your untap step. Whenever another creature dies, untap this creature.