The all-father of anger was familiar with what Arthur was experiencing, thus his dedication on finding a safe place. The strain caused by confining his hatred was destructive for his train of thought as well as his body.
Even when he was in control of Arthur's body, he wouldn't stop shaking and he preferred not to move much to give the sick omnimancer all his chances reaching the distorted cave. He was stunned of how obedient and devoted the man was.
A red spot appeared under Arthur's feet and soon spread to the section of the cave around him. The black slate of the distorted cave changed texture as it reached a lighter shade of orange because of the ridiculous amount of fire magicules escaping his mageroot.
As he was descending the cave, blue sparks punctuated his walk.