Mephisto, Lord of Hatred

Other Black creatures you control have Undying.
{3}{t}: Put two 2/2 Black Spirit Creature tokens in play under your control.
{4}{t}: Target two Non-Legendary creatures. They deal damage to each other equal to their Power. If a creature was destroyed put it back into play under your control as a Black Spirit in addition to it's other creature types.
"The righteous shall fall before the wicked. All of Creation shall tremble before the Burning Hells!"