Mythics are hard to design. You have to make sure they’re exciting, flavorfu, powerfull and create stories. But they can’t be too powerful. This is obviously a very powerful card, certainly one which could see play in the right deck. However if you look at common metagames, it probably wouldn’t break any formats, and in casual, although some people might get annoyed by it, it should be fine overall.
NOTE: As my source for art doesn't really provide me with any names, i dont really have any way of putting the names of artists in the artist name area. Of course though, if you know the artist, please make sure to tell me, so i can update it accordingly! Thanks