Every turn of Teleglow has a 0.01% chance of infecting you with fungal disease. Doesn’t sound like much, until you realize that one glance from a Flaming Eye inflicts 400 turns of Teleglow, and that those glances stack duration. It’s why I avoid Eyes like the plague until I have antifungal drugs, or at least fungicide. The other effects of Teleglow are annoying, but fungal infection is a death sentence.