Titan, The Limbripper

Double Strike, Indestructible

When this creature enters, destroy target 3 targets.

on your upkeep, deal X damage to a creature where X is how many cards are in your opponents combined graveyard.

{9}{r}{r}{r}: Destroy all creatures on the battlefield that aren't yours. Activate this only if your opponent has 15 or more cards in their graveyard. Use this only once.
DESTROY!!!!!!!!!