Is Dormamu a fictional Entity or A real Entity?
Dormammu is a entity invented for the marvel universe. He may be inspired however by a real entity, and can probably be summoned even if he is not by a decent chaos magician
He’s loosely based off of Astaroth.
Hiya OP! Aside from the completely illusory difference in the question you asked, Dormammu is very real, and very much a scumbag. He always goes back on deals, so if you’re approached by a Dormammu, burn it to death! Not worth your time.