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As an additional cost to cast this spell, you may collect evidence 6. (Exile cards with total mana value 6 or greater from your graveyard.) Until end of turn, target artifact or creature becomes an artifact creature with base power and toughness 4/3. If evidence was collected, it has base power and toughness 1/1 until end of turn instead.
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Behind the Mask (MKM-39) is a blue instant from Murders at Karlov Manor. As an additional cost you may exile cards from your graveyard whose total mana value is 6 or more to “collect evidence,” and the spell makes target artifact or creature an artifact creature with base power and toughness 4/3 until end of turn (or 1/1 if evidence was collected). The card can overwrite previous effects that set a creature's power and toughness and interacts predictably with Vehicles and other modifiers according to its rulings.
Catalog pricing data as of 1 May 2026, 17:57
