What do I do when the master sword is low on energy?
I waited 10 minutes for it to charge, but it still says the master sword is low on energy. When I tried to defeat one of the divine beasts it broke.
Like the champion powers, the Master Sword does not begin regenerating until it is completely used up. Keeping it in your pocket when it's weak does not help you get it back to full durability faster - you have to expend it to zero before the timer starts.