It is a long-range attack that is only available from Master Sword, and it can be used with a variety of tactics. When Link has max number of Hearts, press 'R' button to release a beam attack. ▼See more about Maximum Possible Damage Fire Beams When Hearts Are At Max If you fight against highly durable enemies and you are going to withstand long combat, it could greatly reduce the wear and tear on the weapon.
The amount of damage that can be dealt before the weapon breaks is the highest. Even if the number of uses hits 0, it still can be usable again after 10 minutes so do not have to worry about it. It becomes the most powerful weapon only after completing the Trial of the Sword quest from the DLC. Master Sword, a sword that is familiar from Zelda's Legend, is the best sword. Permanently rises to 60 after completing the Trial of the Sword (10 for each time of trials). Becomes 60 Attack Power when near Guardians or Malice, as well as inside Hyrule Castle.