JKSManga
So he literally discovers hundreds of crystals embedded into the cave walls around him and he only takes one??? Hey genius, just grab them all and put them in shadow storage!!! Calling it, at some point, info on the caves reaches the military and kick everyone offworld to hoard the goods for themselves.
Why tf can't he just use the dimensional storage? That's a part of the shadow ability (Apparently a basic part since he got it immediately) and even if Fex doesn't know about it, the head of his family (His dad) would so there wouldn't be any real harm and, if the crystals are everywhere, there's significant gains to be had