Ysegdran Thorn

Flying
Bestow {5}{g}(If you cast this spell for it's bestow cost, it's an aura with enchant creature. It becomes a creature again if it's not attached to a creature.)
Enchanted creature gains +3/+6 and Flying.
If enchanted creature would die, you may instead return Ysegdran Thorn to its owner's hand.