Madness Breaker

Madness Breaker also known as Sword of Ending is a sword created by Yuuto Kiba, with the help of Gray Dantalion with the hope of stopping Ichiro if Dark Ichiro were to ever possess him. First created with the intent of simply being a sword to stop his Power of Souls ability it later became a dragon sword due to the increasing power of Ichiro and to combat his growing strength. It first went into production after the defeat of the Raynare group but it wasn't revealed to Rias and the others until the Holy Sword Incident when Kiba revealed the sword when he was angrily attacking Xenovia. According to Ichiro, when Kiba first unleashed the sword he felt as if his dragon and devil instincts were telling him to run away.