These things created by "Sage Particles" can only be used by the owner of the Alchemy Stone, and as long as the owner has a thought, they will be taken back into the Alchemy Stone.
This is the reason why the feline lady didn't pick up the darts but could still take them away.
Some extraordinary abilities can forcefully plunder tools and energy created by "Sage Particles".
However, since these extraordinary abilities are not "peaceful" enough, they are not explicitly presented in the book but merely mentioned in a few sentences.
Noland Lee stuffed the revolver into his pocket, closed "Power Burst" and "Tracking the Living".
He jogged all the way back to the company, retrieved his books from the front desk, and returned to the dormitory.
He closed the doors and windows tightly and checked the entire room thoroughly.