
Watery Soup |

Although it comes up, you need to evaluate a proportional response. You can always purchase an elixir of darkvision, or a scroll of see invisibility.
Even though invisibility is more serious, I'd prioritize darkvision over invisibility - there's a big team benefit for getting everyone darkvision (so light doesn't give away your position). Darkness comes up all the time, not actively cast as a spell but just because a lot of monsters have darkvision so there's no natural light.