The Viscous Fallout is a corrupted water elemental found in Gnomeregan. Due to the radiation released into Gnomeregan, a portion of the city was taken over by radioactive oozes. Viscous Fallout has coalesced from that mass, and formed its own consciousness, and its own agenda.

Viscous Fallout is a particularly popular creature to kill even for high level players, due to the chance to drop the Hydrocane. This staff allows underwater breathing to the bearer. Unlike some items which provide underwater breathing ( Deepdive Helmet, Hook of the Master Angler), the Hydrocane is a weapon and thus can be switched out in combat.

This NPC can be found in Gnomeregan.