Tyr had orchestrated everything, he had taken a page out of Burger's book and this gave him the edge he needed for this strategy he had utilized.
The sexual assault on Nora was no coincidence, Tyr had manipulated the person responsible in the end, every man was blinded by the promise of gold or success but killing him was never part of the bargain.
Tyr had noticed his lustful eyes trailing Nora everywhere she went and as the Chieftain, Nora had to do everything he said.
But Tyr never had any plans of letting him live, his dying was always part of his plan because he wanted to test the hypothesis of what one would do when their life was saved.
And the result was complete and absolute loyalty, for a sixteen-year-old boy still finding his place in the world.
This was an invaluable experiment that bore fruits.
Tyr's plan was adjusted to fit every new information that he had assimilated, this included Gudrun and Nora's lovers.