Chapter 4207: Strange change of the tortoise shell

This tortoise shell was a little amazing, because it could not be stored into a Spatial Tool.

But aside from that, this thing could not be any more ordinary.

And now, it was actually heating up?

'What? Are you showing off now?'

Ling Han pulled open his clothes a little. He discovered that the tortoise shell wasn't just hot, but the patterns on the back of the tortoise shell were also glowing slightly, but very weakly, like fireflies.

These patterns weren't all that amazing, and they were secretly aligned with the Dao of heaven and earth and the like. If it weren't for the fact that it couldn't be stored into a Spatial Spirit Tool, this thing would definitely have been thrown away immediately.

Why did the tortoise shell glow and heat up? Was there no reason, or… had it been triggered by something?