Unearthly Wurm

Trample
Unearthly Wurm can't be blocked by more than
one creature.
Whenever Unearthly Wurm deals combat damage
to a player, that player sacrifices an amount of
lands equal to the damage dealt.
Whenever Unearthly Wurm is blocked, it gets
-X/-X until end of turn where X is the total
power and toughness of the blocking creature
combined.