Diagaian

Diagaian (聖の神金 (ディアゲーアン), Diagēa lit. Divine Metal of the Saint), also known as God's Ore (神の鉱石, Kami no Kōseki), is a unique metal that is used commonly used by various churches within Earth Land for its ability to crete weapons and armor that are effective for fighting against demons, having a similar effect to Devil and Demon Slayer Magic by purifying their body and soul, inflicting immense damage onto the creatures.

Weapons

 * Claíomh Solais (previously wielded by Sonkei Lasanam and Daitan Morduin, currently located in the home of Tsuyo Morduin; forged by Morrighan Dúwing)
 * Ascalon (wielded by Michael Serafian, forged by an unknown Mage)

Trivia

 * This was created with the intention of explaining how various church fought effectively against demons before the discovery of Magic.