Necrom

Centuries ago, Necrom was the Sorcerer Supreme of his race, based on an alternate reality Earth. His students were Merlyn and Feron. Necrom desired power and decided to use his students to create an alignment between parallel universes, which would generate incredible amounts of magical energy. Necrom and his students traveled to Earth-616 and Necrom asked Feron to summon the Phoenix Force. Necrom attacked Feron, trying to drain the Phoenix Force from his body, but Feron was empowered by the Phoenix Force and fought back. Meanwhile, Merlyn saw his opportunity and claimed the power of the energy matrix for himself. Necrom was wounded by Feron, but managed to grab a small piece of the Phoenix Force from him. The Phoenix Force, wounded, left Feron and fled Earth 616. Necrom retreated to recover. He left the piece of Phoenix Force that he had stolen to animate a corpse, buried underground and over time this being would become known as the Anti-Phoenix. Necrom left Earth-616 and travelled to Earth-148 to hide from Merlyn, who feared his master's return. Over the next few centuries, Merlyn started to create defenses against Necrom, including the Captain Britain Corps, who guarded every single Earth. He also faked his death so that he could plot against Necrom's return from the shadows, while his daughter, Roma, continued his plans, including the formation of Excalibur.

After traveling to Earth-148 (also known as Ee'rath), Necrom conquers it and creates magical monks to be his agents. He is only opposed by Kylun and his lover Sat'neen. After a long battle, Necrom kills Sat'neen and turns her into an undead slave. Furious, Kylun attacks Necrom, scarring his face. Necrom flees to Earth-616 and Kylun follows him, but they arrive months apart.^{[volume & issue needed]}

Necrom goes into hiding and sends a monster of his creation to steal magical artifacts for him. The monster is defeated by the N-Men. Afterward, Necrom summons the Anti-Phoenix and absorbs its power. Necrom kills many members of F.I.6, a government agency sent to investigate unusual disturbances, with Micromax being the only survivor. Necrom then attacks Excalibur itself, targeting Rachel Summers, the host of the Phoenix Force. Necrom, utilizing a fraction of the Phoenix Force, begins compressing the multiverse into a singularity. Rachel, fearing that she will not be able to defeat Necrom, tricks him into absorbing her power. Necrom is overcome by the Phoenix Force and destroyed.^[1]

As a Sorcerer Supreme, Necrom possessed vast magical abilities. He could raise the dead to act as his servants, drain the life energy of others, transform his own body, and teleport. Additionally, he did not age, though he could still be injured and killed.