User blog comment:Crimson and Darkness/Volume 25 discussion blog/@comment-105.111.81.76-20180428224903/@comment-26285797-20180501160008

According to the Arthurian legend, the scabbard of Excalibur is said to make its owner invulnerable to damage. The DxD version seems to give this same protection. This is perfect for Xenovia who is more or less a power idiot, so it will allow her to use her enormous power while ignoring damage taken. Before anyone says it, I know Xenovia has been working to master the other powers of Excalibur, but her battle style is one which focuses on power over technique.