A potion which has given him immense power, and the ability to leave!
Defeat the Mutant of Chaos, before he seeks revenge on the noisy inhabitants of Varrock!
One fateful day, The Doctor decided he was fed up with the noise and decided to move far away from anyone. Weylin decided to move his laboratory to the long abandonded Rogues Castle to the North, where, unknown to Dr. Weylin, something more sinister lived.
Dr. Weylin was thrilled with his new laboratory, but he kept missing key ingredients and his potions turned vile. The Doctor suspected something was wrong with his surroundings, and attempted to leave. When he attempted to leave, the door was jammed!
Dr. Weylin kept trying new combinations of potions to grant him the ability to leave, but the Chaos Essence seeping in through the walls, kept causing him to create awful, toxic potions. Until the Chaos Essence mixed into one of his creations, poisoning him, causing him to turn into a Mutant of Chaos.
No one in Varrock has heard from the Doctor in years. Everyone assumed he had died on his journey to the long forgotten Rogues Castle. Until today...