Alseides of the Grove

Flash
Bestow {g}{g} (This card is an aura until removed.)
Enchanted creature gets +2/+2.
When Alseides is cast or detached, enchanted creature or Alseides gets:
Constellation - Add {g} to your mana pool.
If Alseides of the Grove detaches to become a creature, pay {g}{g} or return it to your hand.