Massive Xenomorph

Defender
Massive Xenomorph enters the battlefield with
five petrification counters on it.
At the beginning of your upkeep, remove a
petrification counter from Massive Xenomorph.
When the last petrification counter is taken off of Massive Xenomorph, it can attack as though
it didn't have defender.
{b}{b}: Remove a petrification counter from
Massive Xenomorph.