We shamans mostly use ancient spirits to attack and defend. Powerful ones are precious and rare. The best known alternatives are even more extreme - I do not want to make anyone into a lich.

[...still, Emma is so earnest...]

I must admit that coming here and losing my powers so completely... suggests that a great many things are possible. I would still be wary of my enemy if he were [left alive] in this weakened state, but it is a good starting point.