Shi Yan and Xia Xinyan had been in the cave for three days.
These past three days, even being inside the cave, they felt colder and colder as the temperature outside was becoming lower and lower.
The Ice Cold Flame was a type of Sky Fire. When the heavens and earth first came into existence, the Ice Cold Flame was already around. It had its own consciousness, and it was an extremely special life form in this world.
The Menluo Island was covered with volcanoes. The God realm warrior, in an effort to try to merge the Ice Cold Flame into his sea of knowledge, used the volcanoes on Menluo Island to try and constrain it. But for some reason, he ultimately failed.
Ever since then the Ice Cold Flame had been sealed. Those floating symbols inside the iceberg, were one of the constraints place by that God realm warrior on the Ice Cold Flame.