Graveyard Gate

Zombie you control get +1/+1
{t}: Add {b} for each Zombie token you control
Sacrifice Zombie,{t}: Create 2 2/2 Zombie token.
You lose 3 life.
{4}: Destroy Graveyard Gate. Then return it to the battlefield under your control. It becomes 3/3
Leader Zombie token with "Zombie you control
get +1/+1".