New secret room

[Kaboomkid]

So I used the Summon Sädekivi while fighting Kolmisilmä and it made a path all the way too the surface. while traveling up, I found a secret room that I can't find any information on. it's directly above the boss room far up and is filled with white sand. once I uncovered all the sand, there were two giant slanted rocks with a pot in the center. It is all made of extremely dense rock except it looks like marble. I have no idea what it is for.

[Perseus]

Cauldron room. No one has any idea what it does. (or rather, what it will do.)

[Kaboomkid]

Thanks