On their way to the gravesite, looking at the tomb in front of them, Zhang Chen showed a hint of joy on his face: "There's no real impact, just the surface has been slightly wetted by rainwater."
Zhang Chen squatted down to examine the soil dug out from the ground, which was only wet on the surface, nothing more.
The temperature from the burning charcoal inside the cave transformed into rising steam, constantly repelling the external rainwater, accelerating its evaporation.
After confirming safety, Zhang Chen crawled into the passageway, observing the charcoal that hadn't completely burned through. To prevent himself from running out of oxygen later, he summoned the external rainwater, forming spheres to douse the charcoal, extinguishing the dark flames on the charcoal.