Joker, The Prince Of Crime

Haste, Deathtouch
Whenever one or more equipped creatures attack,
mill seven cards. Then return X target artifact cards
from the graveyard to the battlefield under your
control, where X is equal to how many equipped creatures attacked.

{3}{r}{r},{t}: For every attacking creature, flip a coin.
Untap every creature whose flip comes up heads.
There is an additional combat phase after this one.