You aren't satisfied with being some kind of Mutant Eidolon, you find it far too limited for your ambition.
You become a Tinker capable of recreating any technology prominently featured or implied to be available in the X-Men series & it's spinoffs (X-Force, X-Factor, New Mutants, Excalibur, Marauders, etc.), but this is only the start of your power. You become a powerful generalized Biotinker capable of altering the X-Gene itself, allowing you to research and give yourself or others Mutant powers.
Mutation is a blank canvas to you, and you are it's finest artist. If you wish for more Omega level powers, build them. If you wish to advance mankind into a new species, do so. If you wanted to build Sentinels, you could. Your potential is unlimited, but it is up to you to seize it.