Brundia's Ritual (Valkyrie) skill

The sky splits and a ray of light pours out, reaching out to grasp that light. The light soon transforms into a Flag of Light, and the moment you raise it high, a sacred ritual begins. After swiftly and gracefully swirling the Flag of Light to draw a Sacred Trajectory, Smiting the Earth in a rider's stance unfolds a divine magick circle. The exploding magick circle inflicts Atk. Power Damage to nearby foes, grants yourself and Party Members within a 24 meter radius a Shield equivalent to 100% of your Max HP for 10s, and recovers 60% of your Piety Meter.