Verminlord Corruptor

Deathtouch, Indestructible,
If you control fewer than 5 non-token Rat creatures, Verminlord Corruptor can't attack or block.
Rat Creature you control with power less than 3 are unblockable.
Non-Rat creatures get -1/-1.
Horrific examples of pure pestilence given form, Verminlord Corruptors live up to their name, existing only to despoil and corrupt.