Soul Horsemen

When Soul Horsemen enters the battlefield
look at the top 3 cards of your library and put
them in any order or put a card from your
graveyard into your hand. Prevent the next
3 damage to this creature and deal 2 damage to any target Swamp creatures you control get +2/+1
Swamp humans you control get -2/-1
{x}{b} return {x} cards from your
graveyard to your hand
you may use this ability when Soul Horsemen is in a graveyard