To clarify the above point about the title: You're title is "Mimic I Phase Mimic", whereas you're suppose to use the
pipe character, so "Mimic | Phase Mimic"
On the card itself: I feel the alternative implementations of this idea are better. This could always be changed to repeat the last active ability used (Not sure how it'd work with Mitosis, and whether it'd keep it's ability after mimicing Déjà Vu)