Quick question about monk's Elemental Attunement. Under the "Disciple of the Elements" on page 80:
A discipline requires you to spend ki points each time you use it.
However, there's no ki points mentioned under Elemental Attunement, whereas all other disciplines contain the amount of ki you need to spend to activate it.
So is this discipline treated like cantrips such as prestidigitation where you can cast it as many time as you want for free? Or does it require ki points to snuff out a candle, and if so how many key points per activation?