Arad approached the cave, staring down at the endless darkness among the stones. He could hear water dripping inside, taking a one-way journey to the depths of the earth. Plants and foliage surrounded the cave's entrance as small animals carefully watched Arad from a distance away.
He walked into the cave, slowly making his way deeper and deeper. Whenever he faced a dead end, he would dig his way through using earth magic. After half an hour, he finally reached something that looked different from any normal cave. A large ten-meter {32 feet} wide hole made of chiseled stones in the middle of a massive cavern. It was the remnant of an ancient civilization.
Arad walked in the dark, relying on his draconic Darkvision to see, and started inspecting the hole before jumping in. Writing in a strange ancient language was engraved all around the hole.