Deity

Deities or Gods are a class of entities that exist in the Overlord series.

YGGDRASIL
In YGGDRASIL, gods were commons existences encountered by players. Some existed in the game as special event bosses, enticing players to engage them in battle for the reward.

New World
In the New World gods were held to be existences that were pinnacle of power. They were seen as a standard in which mortals could never reach.

Entire religions have been forged based on their beings, like humans who are creatures that rely on faith in gods as a pillar of moral strength in their everyday lives.

Several existences from YGGDRASIL that have made their way into the New World, creating names of themselves and eventually become deified by the inhabitants as the ages pass. A number includes the Six Great Gods, the Buddha, and even Ainz Ooal Gown.

Faith-based Magic Connection
Deities in YGGDRASIL and the New World play a pivotal role in faith-base magics. Clerics and priests who recite prayers to their patron divinity would be able to cast divine magic.

Many priests of the temples in the New World take these blessings as proof that their gods exist. Ainz Ooal Gown dismisses that to be valid proof, as he believes that the their so-called gods were merely great men that had been deified. However he doubts his explanation since if the Four Great Gods were mere mortals how could their affiliated priests use resurrection spells and raise the dead?

This in mind Ainz believes that the gods in the New World are perhaps super-dimensional beings — which are generously term gods for apparent purposes — that exist originally as colorless entities. Simply put, they are chunks of power that priests draw power from. Since Ainz finds himself to exist in a world with magical laws, he does not dismiss the possibility of gods. Using this knowledge the Supreme Being performed an experiment with a captured cleric, altering his mind to see whether changing his belief in a god would allow him to still cast divine magic. The results left the man unable to speak properly, and so far it is unknown if Ainz gained any insight on the confirmation of gods.

YGGDRASIL Deities

 * Cainabel
 * Buddha

New World Deities

 * Ainz Ooal Gown
 * Sea Dragon
 * Surshana
 * Alah Alaf
 * Divanack
 * Jashin

Abilities
The abilities and powers of deities are little understood. However they were noted by players to be worthy opponents.

Trivia

 * In the Web Novel, as part of his experiment in confirming the existence of gods, Ainz Ooal Gown desires to ascend to the status of a deity within the New World.
 * The Supreme Beings of Ainz Ooal Gown are regarded as gods by their NPC creations.