Shssh'kyra, Swarm King

At the beginning of your combat phase put a 1/1 black and blue Skaven Screamer creature token with Deathtouch on to the battlefield under your contol.
Whenever Shssh'kyra, Swarm King attacks it gains +1/+1 for each other attacking rat creatures you control, and all other attacking rat creatures gain +1/+1 when attacking with Shssh'kyra, Swarm King.