C1940 Copper key

Ye Cheng followed Xiao Hei and ran two kilometres away from the villa. He found it squatting beside a tree, digging at an unknown place with its front paws, and after a short moment, it revealed a crater. When Ye Cheng focused his eyes, it started to emit hissing sounds.

From the hole, Ye Cheng took out a piece of something that looked like a magnet at an extremely fast speed