[ LOOK IT'S DARK and not EVERYONE has dark vision, so how was he supposed to know that this is a special rock. But since Jinwoo is insistent, Claude will take out his phone to act as a torch, squinting at the rock.

And okay, he can admit there is obviously something different about this rock. ]

You should hang onto it.

[ But that second statement... He frowns, glancing around them, the chill raising goosebumps over his arms. ]

Maybe. If you believe the purpose of this entire train is some sort of self-improvement journey, then that very well could be the case.