King's Field

Moonlight Sword
It is possible to obtain the Moonlight Sword without killing Guyra. First, in preparation, fill all of your crystal flasks, have at least one key in a guidepost and a gate to match it. Then, make your way to Guyra’s chamber. When you first get there walk straight towards and strife to the left making sure he doesn’t knock you off. Now when you are as far left and as far forward wait until Guyra is completely facing you.
Here’s the tricky part. Quickly run towards Guyra’s other side and get on the same platform as him, now make a short jump across to the platform where the Moonlight sword is. Now quickly grab the sword and use the gate to hightail it before Guyra has time to turn around and knock you off the platform. If you did this successfully you should proudly be able to use the Moonlight sword.