You may have Mirrorhall Mimic enter the battlefield as a copy of any creature on the battlefield, except it's a Spirit in addition to its other types. Disturb (You may cast this card from your graveyard transformed for its disturb cost.)

Enchant creature (Target a(n) creature as you cast this. This card enters the battlefield attached to that creature.) At the beginning of your upkeep, create a token that's a copy of enchanted creature, except it's a Spirit in addition to its other types. If Ghastly Mimicry would be put into a graveyard from anywhere, exile it instead.