Ikit Claw, Chief Engineer

Whenever Ikit Claw, Chief Engineer
attacks or blocks, other Rats you control get
+X/+X until end of turn, where X is the
number of Rats your control.
At the beginning of your end step, you may
mill four cards. If you do, return up to two
Rat creature cards from your graveyard to
your hand. (To mill a card, put the top card of
your library into your graveyard.)