The release date on mutations for players has yet to be announced and confirmed, and will not be coming out any time soon. Take the information on this page with a grain of salt and not to be taken as fact.
Contrary to what some may think, mutations are not a combination of the First and Second Mind, instead they are both completely independent when mutating.
The First and Second Mind Magic are both able to mutate, while the Third Mind Magic cannot mutate at all. If the player wishes so, they may choose to not mutate their magic to learn additional moves for their source magics.
The chart shown above is mostly outdated. A new chart would supposedly be released a few weeks before mutations come out.
Verdies, Angry Pirate Captain - Plasma Magic
Theos, The War Phoenix - Sun Magic and Phoenix Magic