Warwolf Assault Beast

Trample
Warwolf Assault Beast enters the battlefield with 4
oil counters on it
When it attacks you may remove an oil counter
from it, if you do put a +1/+1 counter on it,
if you don't put two -1/-1 counters on it instead
"While Innistrad's werewolves had an innate
resilience to any form of corruption, they were not invincible to the Great Phyresis"
- Phyrexian Field Notes