kts.CrystalStart – begin "crystal ball" effect (show location of other knights)
kts.CrystalStart()
If the current actor (as given by cxt.actor) is a knight, then the player controlling that knight will now be able to see the position of all other knights in the dungeon on their mini-map. This effect lasts until kts.CrystalStop() is called (or the knight dies).
If the current actor is not a knight, nothing happens.
None.
This is used as the on_approach function for the crystal ball tile.