Pankratosword

Pankratosword is a sword move that, when preformed by a master of the Way of the Sword, one who has the ability to create the Shehai, is capable of destroying anything-- from reality to a human being.

It was created by the Hiradirge Ansei, and was only known by one swordsman ever, who used the move to destroy the Orichalc Tower and sink Yukoda. Horrified by it's power, the swordsman recorded the secrets to preforming the move on a parchment, and hid this document in a cave in Corten Mont, a volcano near Taneth. He passed the location of this cave to his firstborn son, who passed it on to his firstborn son, and so on and so forth, the most recent son being Master Ishien. Ishien trained Daireg, who when he learned that his former master held the location of such a powerful weapon, hatched a treacherous plan to steal the secrets of Pankratosword for himself.

Daireg managed to set his hands on the document, only for it to crumble in his hands. At first furious, enough of the move was intact for him to learn a part of it called the Haft Almawt, or 'Edge of Death.'  He intended to use this on Mercylinda, but was tricked by Diagna-- Mercylinda wore an amulet given to her by the avatar of Hoonding which deflected the sword stroke, causing Daireg to think that the sword move did not work.

With Daireg's death, the knowledge of Pankratosword was finally lost, a benefit to the world.