Ancestral Spirits' Sleeping Place

The two priests did not even have time to answer before the ice blades riddled them like sieves, and they collapsed to the ground.

"...Let's go in."

Benjamin looked coldly at the corpses for a few moments, then waved a hand, drawing the siblings into the soundproof ice sphere as well. Afterward, he even thickened it by several layers. Only after ensuring that nothing could possibly go wrong did he guide the ice sphere forward, flying slowly ahead.

The siblings nodded nervously as well.

Ahead lay a pitch-black, bottomless cave entrance. Who knew what might be lurking inside? Ghosts, Magic Beasts... and even more frightening, unknown existences. To prepare themselves, the siblings released their mental energy, pressing it against the ice walls to add another layer of protection.

Once they had fully entered the tunnel, Benjamin lit a torch. The light passed through the ice sphere, barely illuminating the nearby passage.

The entire tunnel was made of rock. Its walls were smooth and narrow, bearing strong traces of something unnatural. This place should not have formed naturally. It was as though something had crashed violently into the mountain, carving out an extremely straight cavern deep within the stone.

The siblings knew nothing of the forbidden ground's history. They only knew that it had existed for a very long time, appearing alongside their entire tribe. As the Ancestral Spirits' Sleeping Place, whenever a high-ranking tribesman died, their corpse would be thrown in here after the ritual, as though this place were their ancestral shrine.

Therefore, Benjamin had also prepared himself to possibly face undead creatures.

"Free mental energy is drifting through the air," the System suddenly said. "Very interesting. I've never seen mental energy in this form before. They are clearly uncontrolled particles and should have dispersed long ago, yet they