maybe they can breed Psilocybin with buffotoxin...
I call BS on this.
A few years ago, during a Artic Blast, I was in the ER when a homeless guy came in complaining he couldn’t feel his feet.
Common complaint every time the temperature drops.
Anyway, they had to cut the guys socks off and he had tiny mushrooms growing between his toes. So...not the first time mushrooms sprout on decaying flesh.