Gargantua, 4th Floor Guardian

Trample, Reach, Indestructible

Quake — {8}{t}: All creatures take damage
equal to their mana value. If one or more
creatures are destroyed this way, add or
remove one Spell counter on a permanent you control for each creature destroyed.

If Gargantua, 4th Floor Guardian has four or
more Spell counters on it, it gains hexproof.