Horakhty, the Creator God of Light

Horakhty is the combination of the Egyptian Gods: Obelisk the Tormentor, Slifer the Sky Dragon and The Winged Dragon of Ra. She is one of, if not the, most powerful monster in the entire series. Atem summoned Horakhty after learning his true name and she destroyed Zorc Necrophades, the final villain of the series, with just a single attack. The Creator of Light then spoke to Atem directly, saying that it was his friends who had helped him remember his long-forgotten name. In the trading card game, she is a level 12, Divine-Beast-type monster and is the only Creator God monster in the game. She has an instant-win effect that cannot be negated, should she be summoned to the field.