Alternate or 'corrupted' version of the Moonlight Nocturne.
Can only be used during new, young or old moons.
During the battle against a spirit of Nightmare Moon when he discovered the organ in the Old Castle in the Everfree, Logan was force to fight 'her' in order to proceed. During the time, Luna watched as she was baffled at the sight of the Nightmare. However, Logan came out victorious, but rather than finishing her off, he instead did something Luna did not expect: he embraced the spirit.
He said that it was okay, and that she wasn't alone anymore, and that he was, and always would, be her admirer of the night. The spirit then was calmed, and found peace when she was absorbed into the Moonlight Nocturne, during which a new moon was occuring, and the sword changed into this form.
While it is another form of the Moonlight, it is slightly stronger than its original form, but can only be used during three moon phases: a new moon, a young moon, and an old moon.
Its color scheme is based on Nightmare Moon, as the hilt and crossguard, as well as the handle and pommel, match her coat color, the blade color matches her armor set, which also sparkles, and has two starry sections that resemble her mane and tail color and aura. The crossguard has light blue patterns and NM's cutie mark in the center.
Name comes from the fact Logan embraced Nightmare Moon's spirit, calming her and allowing her to rest within the Moonlight.