Forest Creeper

Hexproof, protection from green
When Forest Creeper enters the battlefield, if X was
6 or more, Forest Creeper enters with a indestructible counter on it.

{t}, Sacrifice a land, Destroy Forest Creeper: Sacrifice Destroy target artifact or enchantment, or deal 9 damage to target creature. Activate only once per turn.

"Tick, tick, boom" -Steve