Make a fusion of 5 fictional characters. That's the new you, you not only have their powers but also the junction of appearances of them as well, like a fusion.
With this, you have Amalgamation, Power Mixture and Amalgamorphing as your "true power", so.....
What is your 5 characters?
Note: Don't choose characters who are omnipotent, metapotent, ultipotent, nigh-omnipotent, transcendent, etc., please.