Embark on a journey to discover the three most powerful Nephalem in the world of Diablo.

In Diablo, Nephalem are exceptional characters, born of an angelic father and a mother with demon blood. Balancing both angelic and demonic qualities, each Nephalem embodies a harmonious blend of good and evil. Their power surpasses all warriors that came before. Here are the top 3 Nephalem in the world of Diablo.
Rathma
Rathma is a pivotal character in the Diablo universe. A unique and mysterious figure, he is considered one of the most significant characters in the Diablo cosmos.
As the son of the god of death, Trang-Oul, Rathma is a sorcerer with the ability to manipulate the power of the underworld. Trained by his father from a young age, Rathma became a powerful and skilled sorcerer. Subsequently, he became one of the founding members of the Prime Evils - an organization established by three key figures in the Diablo world: Rathma, Trang-Oul, and Inarius.

Rathma appears in the games Diablo II and Diablo III. In Diablo II, he features in multiple quests, engaging with players and providing crucial tasks for completion. Transitioning into Diablo III, Rathma becomes a significant character in the Reaper of Souls expansion. Players must seek to contact him to confront dark forces.
Rathma is known as a mysterious character, not easily understood. He can wield powerful sorcery to summon undead creatures and control their power. Additionally, he possesses the ability to create another realm, a place where the deceased can be reborn.
Uldyssian ul-Diomed
Uldyssian, a man from the region of Kehjan, where followers of the sun god reside, discovers his ability to control supernatural forces. He is believed to be the founder of the Nephalem doctrine, a belief system honoring the power of all beings, including demons, angels, and humans.

In his struggle, Uldyssian faces Lilith, the daughter of the demon lord Mephisto and Inarius, the founder of the heavenly city Sanctuary. Uldyssian also confronts the betrayal of his brother Mendeln, who becomes Lilith's pawn.
Uldyssian plays a crucial role in the history of the Diablo world, leading the overthrow of Inarius and constructing Sanctuary. This realm allows Nephalem and angelic beings to coexist peacefully.
Main Character

Throughout the Diablo series, the main character (controlled by the player) is known as an incredibly powerful Nephalem. Despite their overlooked background, they possess immeasurable strength.
Across all four editions, including Immortal, the main character in Diablo 3 is regarded as the most potent Nephalem. Praised by the angel of justice - Tyrael, he lauds the power of the Diablo 3 main character when compared to Uldyssian. By the game's conclusion, the player's strength surpasses even Uldyssian, becoming the most powerful Nephalem in history.