Gates of Night

{t},Pay 1 life: Add {b} or {r} to your mana pool.
{3},{t}: Put 1/1 Vampire token with lifelink on the battlefield under your control. Use this ability only once per game.
Sacrefice a creature and this card: Target player puts the top five cards of his or hers library in the graveyard, then deal 5 damages to target player. You gain 5 lifes.