Hone Onna

{b}{b} Hone Onna attaches itself as an
enchantment to the last creature it cast
Lover's Embrace on. Creature gains -2/-2
and is Hexproof.
If the creature dies with this enchantment, tap
{w}{w} to revert Hone Onna to its original
form. If not, send it to the graveyard