Tyr was in a critical condition, he was unconscious and barely hanging onto his life after Gissur was done with him but this was no surprise.
Tur had gotten arrogant and forgot about the warning Kolbeinn had given him, but he thought the same trick with Kolbeinn might work with him but he could not be more wrong.
Gissur was a primal man that had mastered his instincts, he could feel it in his bones that Tyr was a threat despite being just a boy.
But Gissur did not like his blatant arrogance and would have killed him if Tyr did not have an important role to play in the prophecy his wife had seen.
Tyr was saved, and he was rushed to be treated but his condition was serious and there was no way he would be ready for any battle for quite some time.