Rat Plaguemage

Outbreak {3}{b}{b} ({3}{b}{b}: Each creature with a
-1/-1 counter on it gains infect until end of turn.)
Other Rat creatures you control get +1/+1 and have persist.
Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)