Preying Grounds

when you start the game, search your deck for all cards named Preying Grounds and exile them.
{g}{g}{b}{b}, sacrifice a creature: put Preying Grounds into you hand. when Preying Grounds enters the battlefield, sphion 1.
{t}: add {b}{b} or {g}{g}.
{1}{g}: put a {c}(prey) counter on a creature. remove 1 {c} create a -1/2 human with mentor and {g}: a creature gets +1/+0 until end of turn. remove 2 {c} each opponent loses 2 life and you gain 2 life. remove 3 {c} destroy a creature. remove 4 {c} gai