Guram, Rotting Village

Guram, Rotting Village enters the battlefield tapped unless you sacrifice a creature.
{t}: Add {b}, {g}, or {c} to your mana pool.
{b/g}: Sacrifice a creature, target creature or player loses 1 life, you gain 1 life, and target creature you control gets +1/+1 until the end of turn.
{c}: Sacrifice a creature, draw a card.
You may only activate each of this cards effects once per turn.