Cardinal Armament
Crescent is a sword that was created by Yuphra to be their weapon in battle, alongside their hallowed lantern. When used by Yuphra, it was made of a silver so pure that it seemed to glow with moonlight.
When Yuphra imprisoned Týr Sara in chains for committing the sin of changing his own soul into Animus (via The Wolf’s Ritual), they stabbed him in the head with Crescent. After Týr was freed by the Godeater, the Cardinal magic corroded the blade, tarnishing it so black and dark that it no longer glowed.
The sword is still in the possession of Týr Sara.