You cannot add the Mutation I special ability to the 13* through grinding. You can only add the special ability through the "Add Abilities" function.
When you perform the "Add Abilities" function using the +35 Adelaide-NT as fodder for your 13*, Mutation I would appear on the list of abilities available for transfer at a 100% transfer rate. But note that this rate will be reduced below 100% if you try to increase the number of ability slots on the 13* during the process.
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