Irkahn of the Black Flame

Partner with Zesopheltus, Dark Dweller
Doublestrike
{x},{b}, Return target non-enchanted,
non-artifact creature card with converted
mana cost X from target opponent's graveyard
tapped onto the battlefield under your control.
If the creature has the Goblin or Orc creature
type, its mana cost is reduced by 2.