Alduin, the World Eater

Shroud, flying
During each player's upkeep, that player sacrifices two lands.
Whenever a land leaves the battlefield, put a +1/+1 counter on Alduin, the World Eater.
{t}: Alduin, the World Eater deals damage to each creature equal to the number of +1/+1 counters
on Alduin, the World Eater.