Umbral blot

From WoWWiki

This article or section contains lore taken from the Warcraft RPG books.

Umbral blots are creatures found in the Twisting Nether and are described as mobile spheres of pure void. Mutated umbral blots travel through the Twisting Nether, growing larger every time they consume a physical object. If they grow too large they could threaten all of creation. But this is unlikely an issue as heroes have been known to destroy them.^{S&L 153-155}