The Gates of Durvenuul

{t}: Add {1} to your mana pool.
{t}: Add {u}, {b}, or {r} to your mana pool. The Gates of Durvenuul deals 2 damage to you.
Whenever you use The Gates of Durvenuul to pay mana for a creature, Put a 2/2 Black Zombie creature token onto the battlefield tapped.
"Your definition of power is dwarfed by what lies beyond these gates" -Surren