土(ど)建(けん)組(ぐみ)一(いっ)家(か)の工(こう)作(さく)員(いん)

Menace

When this creature enters, choose a creature card in your hand without blitz. It perpetually gains blitz. The blitz cost is equal to its mana cost.

Blitz (If you cast this spell for its blitz cost, it gains haste and "When this creature dies, draw a card." Sacrifice it at the beginning of the next end step.)