Ghalta, Primal Hunger
The List (PLST #RIX-130)
Ghalta, Primal Hunger
CMC: 12
Type
Legendary Creature — Elder Dinosaur
Rules Text
This spell costs 
less to cast, where X is the total power of creatures you control.
Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)
P/T
12/12
Printing
The List (PLST #RIX-130)
rare
Illustrated by Chase Stone