Baroness Altar

The Baroness Altar is a boss spawning altar.

Obtaining
Due to a bug, the Baroness Altar can be mined with a pickaxe.

Natural Generation
A Baroness Altar can be found in each Baroness Arena in Barathos.

Boss Spawning
The Baroness Altar can be right-clicked with a Warlock Gem to spawn the boss Baroness.