How Odin Lost His Eye
1. The True Cost Of Knowledge
Despite his womanising ways and carefree approach to fathering children left, right, and centre, Odin was never anything less than a true warrior and protector of Asgard.
Throughout the years, the Allfather stepped up to the plate to bat away threats from the likes of Surtur, the Absorbing Man, the Celestials, and of course Loki. But it was the threat of the world-ending Ragnarok that saw Odin lose one of his peepers in the world of Marvel Comics.
Yet again, the loss of this eye involved Mimir, and yet again the loss was as part of Odin's quest for knowledge. This time out though, Odin was seeking the wisdom to stop Ragnarok from happening. As always seems to be the case with Mimir, the cost for this information and insight was one of Odin's eyes. And in a bizarre twist, that removed eye would become a sentient being all of its own - complete with all of the memories held by Odin.
Even after this though, there was a spell where Odin was often drawn on the page as having two eyes.
While Odin was successful in being able to halt Ragnarok, that cataclysmic world-ending occurrence was only delayed. To the point where years later it took Odin's son, Thor,, sacrificing both of his eyes to the Well of Mimir in order to obtain the knowledge to put a permanent halt to the threat of Ragnarok.