It seems that Deep Mushroom only grows on the bodies of dead spiders.
Where is this coming from? I've found Deep Mushrooms in caves without spiders, and I've even found it above-ground in places. --♫ KelcatTalk 18:49, January 8, 2015 (UTC)
It was a discovery I made myself. Look at the place after you harvest the Deep Mushroom. It looks like a spider body, lying on its back, stumps of the legs still visible.--Kendira (talk) 08:10, January 9, 2015 (UTC)
I'm pretty sure that's just the roots of the plant; it doesn't look like a spider to me. --♫ KelcatTalk 07:07, January 10, 2015 (UTC)
Actually, I take that back. Found some that weren't obscured by other objects and it does kind of look like a curled up spider corpse. --♫ KelcatTalk 07:10, January 10, 2015 (UTC)