Wow, he looks awesome.
I think to be a merciless assassin of Jandar would require an extraordinary change of heart. Perhaps someone who had forsaken their killing ways and then was murdered(perhaps his family as well) and brought to Valhalla by Jandar to employ his arts again to return and change his/their fate.
Looks fun to play. I like the build up to affect. Very video-game-y. Nice.