Haunting Spirit

Shadow
Bestow {1}{b}
Enchanted non-enchantment creature without shadow gets -1/-1.
If Haunting Spirit becomes a creature after it is bestowed, you may return it to your hand instead.
Haunting Spirit cannot be equipped as long as it has Shadow.
{b}: Haunting Spirit gains +1/+0 until end of turn. This can be used only once per turn.