These mushroom colonies mutates, melts and becomes toxic once their host Icicle Willow withers. Eating them can cause internal frostbite.


--DATABANK--
Once the host Icicle Willow withers and dies, the Frosted Mycelium would undergoes abnormal growth, taking a "melted" shape. The icicles would grows longer and droops fungal liquid that can causes minor frostbite.

While the fungus will now contain toxin and became inedible, it's heat absorbing materials would double in amount. So whether the mushroom being defrosted is a good or bad thing is entirely up to the harvester's intention.

Assessment: Inedible-- still used in fabrication