Lightstone (#59131) (can you even ping in the comments? i dunno, time to find out)

Right now the user who submitted the custom prompt needs to
1. Be the one using the mirror item and then
2. Designate the user they grant permission to have one to hatch!
it looks like this

so ;;; unfortunately I can see that becoming tedious for a lot of custom owners pretty fast, I know that for myself I'll probably be waiting to see if the proposed custom market makes it a bit more hands-off on my end so I don't need to individually handle every request ;-;