Eternity

Because Doctor Strange should at first bite off more than he can chew and come face to face with reality itself in a very literal way. IMO, while in training he should get curious and decide to encounter Eternity then wind up feeling sick and traumatized from the experience.



I also want Eternity to be MASSIVE and look like he does in the comics with the entire universe visible through him. It should be a scene that inspires both fear and awe at the same time.