Cursed Forest

When Cursed Forest enters the battlefield, you lose 2 life.
{t} Add {g} or {b} to your manna pool.
Whenever Cursed Forest becomes tapped, put a 1/1 black zombie creature token onto the battlefield.
On your end step, you may sacrifice 3 creatures you control. If you do, transform Cursed Forest.
"Fifteen people have been in this forest. Only one of them survived, but he turned toward insanity."