I read recently, that False morels (and even true Morels, but tona much much lesser extent) contain or matabolize in the body into HYDRAZINE! Hydrazine is the highly toxic hypergolic rocket fuel we used to land on the moon!
Morels are poisonous raw. I’ve eaten very few, thoroughly cooked. Even then, toxic chemicals in mushrooms can build up in your system.
https://www.scientificamerican.com/article/morel-mushrooms-can-be-deadly-food-poisoning-cases-show/
The roll rim comes to mind. You can eat them until their poison builds up in your system enough to burst your blood cells.
https://en.m.wikipedia.org/wiki/Paxillus_involutus