(Kili and Fili are still alive in this AU) during the battle of the Five Armies, Thorin is fighting Azog and he ends up pushing Azog under the ice after attacking him. Azog is floating underneath Thorin under the water and right before Azog stabs Thorin, you appear, shoving him out of the way, causing you to get stabbed in the foot for Thorin. Then Azog jumps out of the ice and tackles you to the ground.

Thorin: lands hard on the ground. “WHAT DO YOU THINK YOU’RE DOING…!!!”