Shadow Walkers are a strange breed that possess the ability to slip between the planes of reality, becoming immaterial. This allows them to hide in the shadows, either hunting from the concealment of near invisibility or evading enemies. Though they become corporeal to mate or to eat, they spend most of the rest of their lives walking in the shadows. Shadow Walkers are wary creatures, though on dark autumn evenings when the leaves fall to swirl in the chill, rain damp air, they may be seen drifting out from the shadows.

Dragons are highly-intelligent reptilian creatures that—from a human perspective, at least—appear to live forever. Many different varieties of dragon exist, each with their own unique qualities, habitats, and behavior. Adolescence in dragons is usually marked by the growth of a hatchling’s wings, although not all breeds of dragons grow wings and some breeds have other traits that indicate the beginning of maturation. In Galsreim, dragons and humans coexist peacefully.

Nemesis is the silver leader of the Shadow Walkers of SL's cave. He is a calm spirit, and pure leader material. He leads with an iron fist, constantly making sure that his rambunctious group is controlled, otherwise they'd run rampant. He doesn't take any funny business, and gets quite frustrated when one of his group members acts up. But he means well, and only tries to keep Cathal and Marrok out of trouble.

Nemesis doesn't stick to the shadows like most of his species do, but occasionally he'll disappear when he knows he's not needed. He enjoys living out in the sunlight, and believes that the shadows make his bright silver scales dull and provokes one to become taciturn. Nemesis sometimes uses the shadows for quick teleportation. He doesn't fly, and has a very good reason. He is acrophobic, meaning that he is afraid of heights. As a hatchling, Nemesis was dropped from the height of the clouds by an Ember dragon, and he would've died if it weren't for the valiant Sunstone Virtus.