Ruins of Eternal Pain

Ruins of Eternal Pain enters the battlefield tapped.
{t}: Add {b} to your mana pool, Ruins of Eternal Pain deals 1 damage to you.
{t}: Exile a creature from your graveyard
{b}{t}: Return a creature from your graveyard onto the battlefield with converted mana cost equal to or lower than the number of cards exiled with Ruins of Eternal Pain.