Here is the same mushroom from my last post but 3 days later and photographed from the other side.
I feels like a rock with a rubbery coating.
It seems to be growing what looks like roots?
It doesn't seem like it's dying off, rather it seems to be growing stronger.
It's growing under a pear tree, maybe it's feeding off of dead roots?
I'm thinking maybe a ganoderma?
Here is a closeup and one from the same angle as my last post:
Edit: Here it is 3 days ago:
could be, but the German language wiki says it is soft when young. Also our conifers are pretty far away from that spot. I guess, I'll have to wait a few more days to see what it turns into.