Umbral blot

From WoWWiki

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

Umbral blots are a creature found in the Twisting Nether, they are a mobile sphere 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}