Cataclysm Elemental

Tribute 2 (As this creature enters the battlefield, an opponent of your choice may place two +1/+1 counters on it.)
Haste, trample.
At the beginning of your end step, sacrifice Cataclysm Elemental unless tribute wasn't paid.
Some Vazdurek mages once tried to bend the raw essence of Cataclysm into their elementals. Their mistakes haunt the Covenant to this day.