Editing Dark Knight (section)

===Oath of Duel (★★☆)===
A powerful magic that creates a space where other people cannot interfere when proclaiming your affiliation and name to a combat partner you wish to duel with. Other than the two people targeted by the spell, others cannot enter, attacks and spells from outside are repelled or absorbed. On the other hand, attacks from the inside will also not come out and both duelists will not be able to leave until their battle is resolved.<br/>

This is one of the fundamental spells that monsters can use unconsciously with "people repelling magic," the effect of which is activated by an oath to fight their opponent in a duel. "Repelling magic" consists in the fact that when a monster engages in intimacy with a loved one, their essence and mamono mana mix with each other and the overflowing energy of the couple activates these spells, which create an aura of inaccessibility, that is, magic that eliminates the interference that prevents the intercourse. It is because of this effect that monsters who make love to their prey on the battlefield do not become the enemy's target, their invisibility due to the magic. "The Oath of Duel" is not a sexual act, but a spell that will not interfere with the battle. However, because of the nature of the magic that became the source, once you defeat your opponent in a duel, this magic will not simply dissipate unless you and your companion vow to be together.<br/>

Sometimes, even if your duel ends, the spell won't dissipate and you won't be able to get out. In this case, it may be because the dark knight has been thinking too much about the battle, assuming that "after the battle we will be together forever." In that case, in order to get out, you would have to make love at the place of the fight.