Heiyu the Little Monster

Haste, Trample
Whenever you or a planeswalker you control is attacked, you may untap another target creature you control. That creature blocks this turn if able, and can block an additional creature this turn.
Whenever Heiyu the Little Monster takes combat damage, you may destroy target artifact. That artifacts controller takes X damage where X is the number of artifacts placed in the graveyard during this combat.