Semus Radclaw, The Wicked

Indestructable
For each additional mana used to cast Semus
Radclaw, The Wicked put 5 1/1 counters on it. At
the beginning of each opponent's end step, they
must sacrifice creatures of a combined power equal
to the number of 1/1 counters on Semus Radclaw,
The Wicked or they lose the game.