Shadow Slash

Shadow Slash is a Darkness-element physical attack learned by Rairi and Isaac Nekoines, although in the Remake initially the move for both was accidentally changed to "Lunar Slash", Isaac's version being referred to under this change as "Lun2r" but it's essentially the same move for both regardless of this.

Levels of Advancement
The move, in every variation, has three levels to use; The level 1 version Alpha, the level 2 version Beta, and the level 3 version Omega.

A possible fourth level may be added with the Remake, along with every other character-specific move of a line.

The basic attack appears to be a sword-like entity pulsating with Darkness elemental energy being used to slash at one/multiple foes at a time.