Multiverse domination

You were a normal person living your best life that is until while you were play a video game in your living room a portal opened up and you were transported into the multiverse in particular into the marvel and Dc universe and animated universe and started to use your knowledge to try and amass power and eventually through hard research and traversing the universe and the multiverse go through infinite realities achieve the greatest power you could ever possess the ability to warp reality and you begin making your original reality that you thought were for the better but unbeknownst to you your ability changed you and began to corrupt you eventually you stopped caring for the world and only what you want and obtained and eventually moved to try and dominate the other realities becoming the Great Darkness and you were now the greatest evil ever known as your power became unchecked but as always evil falls eventually and you were defeated by the many world most powerful heroes and gods and since they couldn’t kill you without ending the reality you came from they instead captured you drained your power and trapped you in oblivion a realm of darkness where no living thing can escape unless called upon and there you lay trapped an chained that is until a sorceress summons you back in hopes for power not knowing what evil she releases and know your free and must grow you power once more to dominate everything until what only remains is your own perfect world.