Supreme Heroes are evolved Advanced Heroes, they are even more powerful and looks different than other Heroes. You need to gather 3 items and a blueprint to be able to evolve your Hero to Supreme status.
When your Hero reaches the rank of B.General and level 70 the option to evolve into a Supreme Hero appears in the Hero Academy .
Specific items (combined from materials) and a blueprint are necessary to start the evolution process. Optional is to add a Level Scroll as addition to the previously mentioned items to save the EXP progress you have made with the Hero.
'''Warning!''' Evolving without a Level Scroll will result in a evolved Dino Hero at level 1!