Jenna: Sure you don’t. You are the Great Sephiroth afterall. *grins at him then walks forward. She would ignore any complaints that Seph gives her before finally stopping at a cliff that looks down on a pool of magma below* That would be what the core of this planet is filled with, molten rock. It is hot enough to heat up the ground water above and that ground water seeps up into the spring and creates a natural hot spring.