Darth Nihilus

Menace (This creature can't be blocked except by two or more creatures)
Darth Nihilus' power and toughness is equal to the number of lands you control.
Whenever Darth Nihilus deals combat damage to a player, that player searches their library for a land. This land is exiled.
{1}{b}{b}: Insatiable hunger-Take control of an opponent's land. Darth Nihilus gains +2/+2 until end of turn.