Stay a while and listen...

[Treesh]

There's supposed to sometimes be an anvil in Griswold's old smithy which may or may not do something.

There is an anvil there every now and then I've seen it in beta. You can also get a mushroom by Adria's hut sometimes too. Neither is always there, but I can confirm that they can be there.

Is it a big black mushroom?!

Yes in fact it is and there is some audio associated with it too.

Oh fantastic! Is it the actual "Buh" type sound like when you moved it around in your inventory in D1? I still know that sound and I still remember Adria being pissy while saying "It's a big BLACK mushroom!" at me.