Vincent rarely uses the Haunting Hymn skill of the dagger… Normally, it's only used when he truly wanted to kill his target… After all, it's not cheap to use this ability.
[ Haunting Hymn: In exchange for 120 durability points, the dagger can ignore the location and defenses of the marked target and pierce them precisely. ]
That's right! A staggering 120 points of durability will be lost in each usage of this ability!
Nevertheless, Vincent decided to use it against the Celestial not because he wanted to kill her but because he knows that if he don't make such a decisive skill, this Celestial might do some more tricks to disrupt his Pseudo-Celestial Energy flow…
He can't let that happen since he has limited Magic Tools that don't require his energy to activate their skills.
Luckily for him, Haunting Hymn only consumed durability points and not his energy…
Buzzz…