Sam observed the whole setup. It is just a combination of some formations that are good at toning down the temperature.
He used the energy vision to see how dense the spiritual energy is and couldn't help but feel surprised.
This Lava is the richest fire elemental energy source he has ever seen in this realm. He didn't see a single volcano on planet 1 or planet 2 so this is understandable. But this lava is actually hotter than the lava he saw in the Naga Loka.
It is hotter than the Lava in the lake of the Volcanic region of Naga Loka.
Sam took out a bar of metal and placed its tip in a smaller empty pool.
The tip started melting as soon as it came into contact with it.
This is a high-grade metal that could be used to make armors for a Pre-transcendent stage cultivator and it melted this easily.