C61 Burning Tree Demon Valley(1)

While he was in a daze, there was a black stone in front of a boulder and in the middle of a pile of dirt that attracted his attention.

This is...

Confused, he went forward and picked it up.

The black stone had a crystal texture, and its surface was irregular, but it reflected light. The stone was not heavy, and it was very light in his hand.

He recognized this stone.

It was a piece of flint