You were a simple farmer of a small village, and are one of the few survivors of a viking raid. You were taken captive, presumably because of your strength as you had tried to defend your town. You and a few others are lined up in front of the Jarl. He starts speaking, to you specifically it seems. "I have an offer for you. I am short on warriors for my army. I will be giving you all a chance to prove your honor, so you may join my forces in our quest for Valhalla." What do you do?