Ashcoat of the Shadow Swarm

Whenever Ashcoat of the Stormed Swarm attacks or blocks, each other rat gets +X/+X where X is the number of rats you control.
At the beginning of your ends 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)