XV Episode 6
An attempt at recreating an ancient power once thought to be held by vampires, just as the name suggests, it allows the user to forcibly interfere with others minds via a cursed gaze.
It's difficult to use on someone of disciplined will and requires taking advantage of the target's weaknesses or emotions, and so can't be considered a very effective weapon.
Unless, of course, it can be mastered.
In that case, it becomes a fearsome evil eye.
It can corrode the heart, impacting not only judgment but also self-esteem.
This in turn can increase the target's dependence on others, causing them to exhibit a number of effects similar to suggestion or hypnosis, such as forcing them to carry out a command.
Swallowed by the rage from having witnessed such a tragedy, Tsubasa allowed herself to fall victim to her opponent's gaze, causing a seal to be carved deep into her heart.
Said seal is exploitable not only by the one who placed it, but also third parties.
Using a trigger phrase, it is easy to seize control of her consciousness.
the one using that trigger is the heretic Kazanari Fudou himself.