The_Puffer
consume infinity gems, vibranum in high quantities, adamantium, carbonadium, Promethium, Uru, cosmic cubes, the infinity gauntlet, The casket of ancient winter, Maybe the corpse of some celestial, the liquid from the super soldier serum (use it something like nose blood, the ark reactor, Some powerful artificial intelligence, to get hacker skills, And finally maybe some symbiote, to try to grab their body modification properties to improve yours, You could go with the fantastic four, when they go to the other planet to investigate and get their powers from a liquid on the planet, and once you get to them, Throw yourself directly into the liquid of the planet to absorb all its energy and ability to give powers, to make you even stronger