Mímir

Mímir, sometimes rendered Mimir, is a figure in Norse mythology renowned for wisdom and memory. The name is often connected to remembrance, though its precise etymology is uncertain.

According to myth, Mímir is the keeper of Mímir's Well, a source of immense knowledge located at the root of Yggdrasil. The water of the well endows understanding, and Odin, in his pursuit of wisdom, sacrificed one of his eyes in exchange for a drink from the well.

During the Aesir–Vanir war, Mímir was beheaded; Odin preserved the head with magic so that it could continue to offer counsel.

In modern times, Mímir has appeared in various works of popular culture, most notably in the God of War video game series, beginning in 2018, where he exists as a sentient, talking head who provides lore and guidance to the player. He has also appeared in comics and other adaptations.