Cleansing the Holy Spring

Mm... come here. How do you feel about putting your weapons to work for a good cause like promoting trade, and not just pointless murder? Hopefully, helping a handsome Elf will sweeten the deal!

You see, I sell holy water from that comes from that spring over there. I've got exclusive rights to it. I could live until the end of my days never lifting a finger, but you know, I really wanna make the business grow. Maybe I could even build a beverage packing plant or something. Manpower is cheap as heck out here in the boonies, so why not?

There's only one little snag. All of a sudden some will-o'-the-wisps appeared near the source. Rumor has it that they're cursed. I have no idea where this cheesy stuff comes from, but the pilgrims who are my customers tend to believe every stupid thing they hear.

I must get rid of every last one of these will-o'-the-wisps, and the sooner, the better. I can't afford to have the pilgrims see them. So, can I hire you to do this?