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