The Dream Realm, capable of invoking the deepest regrets hidden within one's heart, is not a negative state. Although classified under beguiling skills, it doesn't affect a person's mental state. In fact, within the Dream Realm of their own making, the recipient's will remains clear. However, often times, it's simply that the recipient does not wish to wake up from the dream they've created.
The Dream Realm cannot inflict damage, but the horror lies in dreaming during combat, especially dreams one does not wish to awaken from. The result of such a situation is nothing other than the loss of one's life.
To break free from the Dream Realm, the only method is to personally extinguish the beauty within the dream and awaken from it. At this moment, the will attribute, as part of the secondary attributes, becomes vitally important.