Gaeanus's Favor

Enchant player
Choose one:
-Whenever enchanted player draws a card or recieves {u} or {g}, enchanted player loses 2 life.
OR
-Whenever enchanted player draws a card or recieves {u} or {g}, enchanted player gains 2 life.
{2}{t}: Add {u} or {g} to enchanted player's mana pool.