by Horologiom
The rules say, you may burn power DURING YOUR TURN. So - you have to do it in your last turn. If you have still plenty of power in your bowl I, you cannot burn it - even if you may move it later in the turn of another player.
That is true. :star::star::star:
I must admit that in our testplays we weren't always strict with this rule and played it more generous, so after reading the rules about that point again, I have to cancel my prevoius unprecise answers.
Sorry for any confusion.:(