Rune of Moment is a time-elemental master arts introduced in the Trails Universe from Ao no Kiseki.
With a Time Master Quartz installed, the user calls upon the power time Sept-Terrion to activate the art. The caster is enclosed within a glowing circle outline being the central core of the magic circle surrounding the entire battlefield.
As the caster remains in place to preserve the circle, all other party members gain full turn advantage (0 AT) upon the art's activation. In addition, all attacks gain slight delaying effects.