Ashcoat of the Shadow Swarm

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 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.)