Evolved Spinoderm (Phyrexia: All Will Be One)

Creature Ñ Phyrexian Beast - This creature enters with four oil counters on it.
This creature has trample as long as it has two or fewer oil counters on it. Otherwise, it has hexproof.
At the beginning of your upkeep, remove an oil counter from this creature. Then if it has no oil counters on it, sacrifice it.