The interior of the cave entrance was a downward-sloping, deep corridor illuminated by the same cold light crystals, from which a current of air older and with faint energy fluctuations flowed out.
After Duke investigated and found no potential danger, he protected himself with yellow sand and stepped into the downward-extending corridor.
The oval entrance behind him quietly sealed itself after he fully entered, and the wall restored itself to its original state, as if the passage had never existed.
The corridor was silent, except for his nearly inaudible footsteps and a distant, deep hum as if coming from the depths of the earth's core.
The light emitted by the cold light crystals reflected on the smooth corridor walls, forming patches of dreamy halos.
After walking down the deep corridor, Duke traveled for several hours in this inhumanly grand relic.
