Abyss Furnace: Add Points to Become Stronger

Shen Yuan was on the verge of death in an accident, and his consciousness sank into an endless dark abyss, where he saw an ancient furnace burning with black flames. There is a furnace in the abyss, but the black flame is silent. Everything that goes into the furnace becomes firewood. And when Shen Yuan realized what the flame was smelting, it was already too late.