Mimic

Mimic (擬態, ミミック, Mimikku) is a Caster Magic involving copying an opponent's Magic.

Description
This Magic allows its user to mimic another Mage's Magic and utilize it as if it is their own. This form of Magic appears to be quite peculiar, with even Fairy Tail's founder Mavis Vermilion, a spirit with many decades of experience behind her, remarking on its rarity. The specific mechanics behind Mimic are as of yet unknown; it's unconfirmed what the user has to do in order to copy other's Magic or how many types of Magic they can have at their disposal at a given time.