Nekrozoth

Nekrozoth is the overall main antagonist of the entire Multiversal Legends franchise as a whole first appearing in the Beyond Dimensions movie. Nekrozoth is a Prime Alpha and the leader of a race of destructive entities known as Prime Omegas who are the evil counterparts of the Alphas. Being a primordial god who is as old as god himself (who in the this shared universe is named Deus), Nekrozoth serves as the enemy toward all life across the entire multiverse due to having the ambition of wanting to destroy the multiverse and remaking it in his twisted image where every living being is tortured and suffer in ever horrific way possible. He serves as the "Creator of Evil" being it's literal creator and master, it's his goal that he wanted to tip the balance between good and evil so that evil will reign forever.

Nekrozoth orchestrated many conflicts between good and evil throughout the franchise, and being both directly and indirectly responsible for creating most (If not all) of the villains or at least some ways connected to the villain or the conflict they started. Also being the archenemy and main reason why the Champions exist, while also serving as the main villain for most stories and arguably being the most recurring antagonist. This makes Nekrozoth is the main antagonist of the mythos as a whole.

He first started as the main overarching antagonist of the 2019 sic-fi adventure film Beyond Dimensions, one of the main antagonist of Champions of the Multiverse, one of the two main antagonist in The Greatest Crossover of the Century (along with Endgame the Anti-Maker) and later the main villain of Omniversal Champions and Omega Wars trilogy series. Nekrozoth was also the Overarching Antagonist of Project Pandora, Kirby Stanley the MasterMaker, and Chaos Gate.

Personality
Nekrozoth is the Champions most dangerous and evil enemy they have ever faced and the reason why they exist being highly competent, diabolical, sophisticated, and cruel. He is the very definition of a Complete Monster as he has no noble goals or redeeming qualities as he is a being of pure evil. Nekrozoth is a sadistic being who delights in seeing others suffer through torture and death while showing no signs of remorse or empathy.