Sometimes the back faces will have abilities that refer to the "exiled cards used to craft" those faces
You should check and treat the official rules as final and the below information is for reference only
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You'd then start making copies of your mutated creature, and have multiple Gemrazer + Scute fusions on the board
What truly matters when creating custom MTG cards is finding the right value-to-cost ratio for each one and considering appropriate levels of power for different rarities
