Get From Treasure Chest On Top Of Pillar Of Hyrule Castle 1F
Royal Claymore can be found in the treasure chest on top of the pillar in the back right of Hyrule Castle 1F.
Available From Caves
Robred Dropoff Cave
Walnot Mountain Cave
Royal Hidden Passage
Satori Mountain Cave
North Akkala Beach Cave
Sahasra Slope Cave
Oren Bridge Cave
Sage Temple Cave
Sturnida Springs Cave
Lake Darman Monster Den
Where To Get The Pristine Royal Claymore
The Shadow Soldier Which Drops The Royal Claymore
Available From Shadow Soldiers When Decayed Weapons Are Broken
The Pristine Royal Claymore can be obtained from the Shadow Soldier in the Depths. Note that the Undecayed Weapon will not appear unless you destroy the Decayed Weapon of the same name, which can be obtained on the Surface, so when obtaining the weapon, destroy it first.
Available Whenever A Red Moon Occurs
Shadow Soldiers respawn during the Red Moon, allowing you to obtain the Pristine Weapons repeatedly.