Bog Overlord

At the beginning of your end step, Befoul 1 (Put a Grave counter on up to one target land you control. It gains '{t}, remove a Grave counter from this land: Create a 2/2 black Zombie creature token.')
{t}, Sacrifice a land with a Grave counter on it: Destroy target creature or artifact.
When Bog Overlord dies, return all land cards from your graveyard to the battlefield.