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 3uu
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ghastly mimicry
enchantment - aura
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.