Loki

Loki is a Norse trickster god. He is trapped in a cavern under the Earth, where a snake drops venom into his eyes. Lucifer visits him to ask for the use of the Naglfar.

Loki features more prominently in Sandman's Season of Mists and The Kindly Ones arcs. In Season of Mists he escapes from his cavern, leaving Susano-o-no-Mikoto there in his place, but Dream rescues Susano and leaves a decoy in his place. In The Kindly Ones Odin returns Loki to the cavern.