Aiushtha, the Enchantress

Bestow {3}{g}{g} (If you cast this card for its bestow
cost, it's an Aura spell with enchant creature. It
becomes a creature again if it's not attached to a
creature.)
Lifelink
Enchanted creature gets +2/+2 and has Lifelink.
Whenever you gain life, gain double that much
life. Can only trigger once per turn.