@matt Thanks for making me realize it's okay that I can't solve these things. Every so often I say "I should learn the algorithm!!" and go to a website that says something like "you just need to LR'U'RL'D" and close the tab.
"Magical mushrooms or fungus that feeds off magic like the nuclear reactor shrooms" was the full note, for posterity.
I think I stole that from the latest Adventure Zone?