What is Sailor Neptunes mirror attack in the Kaguya manga arc?
In the Kaguya arc of the manga (which was the basis for the Sailor Moon S Movie), Sailor Neptune, Sailor Uranus and Sailor Pluto perform an unnamed move using Sailor Neptune’s Deep Aqua Mirror. They use the Deep Aqua Mirror to locate the comet which had disappeared from radars, that’s heading towards Earth and then use it to teleport them to the comet. It appears to be a Sailor Teleport kind of move, however because they don’t know their destination, they have to use the mirror as their targeting system.