Bubonic Archmage

Infect
Every creature your opponent controls gets
-1/-0 for every Plague counter on it.
Every creature your opponent controls gets
-0/-1 for every 5 Plague counters on it.
Every creature you control gets +0/+1 for every
Plague counter on it.
Every creature you control gets +1/+0 for every
5 Plague counters on it.