Experimenting with Troll biological material during the Troll Wars, Dr. Acrid created the process by which gruff could be transfused with Troll essence. His first creation, Thump, is now accepted as the probable cause of the Plague and also Licky's disease.

Aftermath of Rage of the Trolls Edit

Dr. Acrid died during the chaos of the Plague and the return of the Trolls.

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