land of the accursed

as an additional cost to this land, sacrifice a creature (4/4 or stronger), a planeswalker with 4 or more loyalty, or you lose 4 life,
{t}:create 3 1/1 zombies, 2 2/2 skeletons, and 1 3/3 wraiths.
{t}:add two mana of any color to your mana pool.
{t}:create a 2/2 horror for every creature in your graveyard, exile all creatures from your graveyard.
{t}:create a 5/5 elite undead for each planeswalker in your graveyard, exile all planeswalkers from your graveyard.
{t}:return all your exiled cards to the