Hm, alchemy? Well, she couldn't say she knew much about that at all. The little exposure that Mokou had received towards that discipline was ironically in stories surrounding Hourai and the elixir, and it was anyone's guess if whatever Eirin had done to create that counted. She wasn't one to go over and ask anything of the taoists that had shown up recently, after all.

Except to fight them, what else were immortals supposed to do?

"This is pretty normal for Gensokyo. Normally when something strange is happening, I don't think most people pick random fights."

Fairies, maybe.