The accessory you have to look for is called Spiked Choker. It has the desciption "Makes the character fight automatically." and can be bought in Aldlyn so people can obtain it pretty early.
Figured that out however now I'm confused as to how ryen lost his armor crushing skill? I recently noticed it's not on his list, however said list is full of skills from his draconic skill, supports and some learned. Is it even possible to lose a skill?