Psychic Ancestor Coral and Rhachis Ancestor Spindle
It was a massive cavern, situated deep underground. Two tunnels branched out from the dome-like structure, with the one on the right leading to a pool of lava and the one on the left leading into a ground mottled with holes of all sizes. A tunnel spanned vertically above the one with holes, heading towards the surface.
Geysers erupted from time to time, heading towards the surface due to the tremendous force in them. Part of the geyser splashed onto the walls, cooling down as they streamed towards the tunnel.
Due to the steep path, they eventually made their way into the dome-like cavern, vaporising from the heat. The lava in the other tunnel churned, with its surface a darker shade than the rest, showing its decreasing temperature. It formed small plates that broke from the lava's turbulent motion, eventually sinking within. The heat emanating from it seemed inexhaustible, unable to be cooled down by the water inflow.