Why can’t we configure it through the standard light source, like in crystals? Doesn’t it work? Then you could do this: Take a crystal, make it invisible, then add the desired light and place it at the coordinates of the desired object.

Added 2 minutes later
Okay, I didn’t know where to write this, so I’ll write it here: Is it possible to make a hero gain levels after level 40? I know it’s probably absurd, and I’d have to manually adjust the amount of experience gained, but still.