The next destination that they went to is a place where there are things called lava lakes. They are not really lakes but a collection of large bodies of lava running deep in the earth. The Elemental King living here is the Fire Elemental King Salvo. A Fire Elemental King that has the appearance of a flaming snake.
The Fire Elemental King Salvo was not very friendly at first, but he did become a bit more welcoming when they showed the Pure Water blessed by the Water Elemental King Adamsale. When Peridot stated what she was there for, the Fire Elemental King Salvo softened up and gave her a test to describe what is fire.
"Fire for me is a bringer of life because life made it possible for any living being to fight against the cold. It also made it possible to cook food to destroy anything harmful within it. Also, food taste better when cooked!" Peridot answered which made the Fire Elemental King Salvo laugh.