The Pool of the Grey Ones is used to summon bosses by finding figurines around Siptah. The Geyser FX are triggered by by the player and reveals some sinister creatures.
Huge thanks to Senior Game Designer Henry Senger for his awesome work on the systems for the pool and Art Producer Kris Hammond for his invaluable feedback. And the guy who brings the game to life through his incredible audio talents, Senior Audio Designer Aaron Gallant.