[True, but the last mission requires a lot of killing in order to win and turn the tides of battle and save whatever humanity left on the planet. Still, indeed it was a possibility]

Come on over in the morning, and I can train if you're able. Swordsmanship and archery is a good start. There are others training in handling a gun.

Spirit levels. In my world, we call it Qi and to raise one's qi or spirit is to help channel that into casting spells to attack your opponent. I raise my Qi to attack using magic paper talismans and set the demons on fire for example.