The *first* time I did it, I thought the problem was that although I eliminated all the other Yeti, and Gull Hookbeak was fighting the Boss Yrrs Snagtooth, I *thought* my guys accidentally killed Snagtooth, so Gull couldn't kill him, and that's apparently the point.
So *this* time I was very careful to make sure my guys didn't kill Snagtooth. We wiped out every other Yeti in the region, and then Gull and Yrrs started a big rumble on top of a cliff all alone. But they just kept punching it out for what seemed like a very long time...
Then all of a sudden Yrrs WON! So it said "start again".
I didn't know if I was supposed to interfere in the fight, but just not "kill" Yrrs myself, or what... but it’s not working. Am I supposed to help Gull Hookbeak by hurting (but not killing) Yrrs Snagtooth?
What am I doing wrong? Any suggestions?