Quan Chi's Fortress

{t}: Add {b}, {r} or {g} to your mana pool.
{b}, {t}: Target player loses 2 life and you gain
2 life.
{r}, {t}: Quan Chi's Fortress deals 2 damage to
target creature.
{g}, {t}: Target creature gets +1/+1 and gains
hexproof until end of turn.