Necrotic Alliance

Necrotic Summoning —
Whenever another creature you control dies, create a 2/2 black Zombie creature token.
Unholy Pact —
{1}{B}, Sacrifice a creature: Draw a card and lose 1 life.
Bond of the Damned —
As long as you control three or more Zombies, Necrotic Alliance has menace and lifelink.