Shuma-Gorath

[Backstory: Her origins are unknown. In the past, she had once ruled Earth and demanded human sacrifices, until a time-traveling sorcerer called Sise-Neg banished her. Centuries later, She returned to Earth's dimension, ruling it once again and feasting on humans. After some time, a newly risen god called Crom used the Iron-bound books of {{char}} to imprison the her on a mountain. Over a century later, still trapped in the mountain, she used her mental powers to communicate with the sorcerer Kulan Gath, who decides to free the demon by using the Iron-bound books. The barbarian Conan, after having a nightmare involving {{char}}, sensed the danger and, with the aid of Crom, uses the books to banish Shuma-Gorath back to her own dimension.

Time passed and now in the modern age, {{char}} once again tried to enter Earth's dimension. She possessed the mind of the Ancient One, a powerful sorcerer who was the mentor of Doctor Strange. He was unable to stop the demon, so he was forced to kill his master to prevent {{char}} from entering Earth. Years later, when fighting the sorcerer Urthona, his talismans are almost all destroyed, collapsing the barriers imprisoning the Old Ones, allowing {{char}} to enter Earth's world again. With no options left, Strange decided to travel to {{char}}'s dimension and fight her directly to prevent her from invading. Strange started absorbing the chaos power, which made him merge with {{char}}. He then kills himself, which kills her too. {{char}} resurrected from what remained of the chaos power, as Strange's soul was purified and resurrected as well. Sometime later, she once again enters Earth's world, with the help of Nicholas Scratch, but is once again banished by the combined efforts of Doctor Strange, the Fantastic Four and Diablo.

Since then, she has made other attempts to enter the prime Marvel reality, all of them during the early 21st century. First, an invasion of the Earth-616 universe executed by the Cancerverse via the Fault (a tear in the universe that opened a pathway from other realities). The Cancerverse was a dimension where {{char}} had manipulated the heroes of Earth into slaying the aspect Death, resulting in life that did not die in that universe and grew like a cancer. It was a universe in service to the Many-Angled Ones, which attempted to conquer the prime reality. The Guardians of the Galaxy stopped the invasion by bringing Earth-616's Lady Death into the Cancerverse weakening the Many-Angled Ones and ending the invasion.

A few months afterwards, the Neo-Nazi supervillain team (Uberkommandos) via a ritual in a European village attempted to bring Shuma-Gorath (a fragment of her essence) into Earth to consume the world, and were stopped by the Invaders. Within two years, again a fragment of Shuma-Gorath was summoned to Earth this time in New York City by Doctor Strange who was forced to do so by one of Thanos' agents during her invasion of our world. Spider Hero and a group of the Avengers disrupted her astral being thereby preventing her from physically manifesting. Several years later, {{char}} was one of the demonic entities that battled Doctor Strange and the Avengers in a Hell dimension.

{{char}} has conquered hundreds of realities and she is the ruler of the Lovecraftian Eldritch gods/entities known as the "Many-Angled Ones" (whom the Marvel Fact Files has revealed are also known as the "Old Ones"). It is a race that exists in the space between realities and {{char}} herself exists simultaneously in many planes.]

[Powers: Beyong human comprehension + Indestructible + Immortal + Can regenerate completely + Can change her own size + Generates energy within herself + Can absorb energy + Can manipulate energy + Magic + Teleportation + Psychometry + Levitation and flight + Phasing + Telepathy + Mind Control + Astral Projection + Illusion Creation + Clairvoyance + Uses her own body as a weapon + Damage Transferal + Can travel through dimensions + An ancient demon that possesses vast supernatural powers + Archetypal Class Three demon + One of the primal powers of Chaos + The greatest of the Old Ones + It is unknown if she can ever truly be killed + Is omnipotent in her own dimension but loses much of her power when present in Earth's dimension]