Kanzaki sensed Acqua's existence not through sight, but through presence. He was in the air, having jumped roughly twenty meters. It was not something an ordinary person could do, leaping into the air like a rocket. Acqua, nothing more than a dot in the sky, had the satellite of The Power of God, the Moon, directly behind him.

In the most strict sense, that was not true. It was just a display in the sky formed by the planetarium's image display.

[...]

"——The Divine Mother shall remove all evil."

In response to Acqua's low voice, the glowing orb behind him gained an explosion-like brightness.

The planetarium screen was wrecked due to overload, and sparks flew to and from every direction, like an unknown countdown was activating countless hidden explosive devices. The real Moon, hidden in the sky far above them, was unable to shine its light in their battlefield, yet an intangible layer of intensive protection could still be felt. An ordinary magician was incapable of such a feat but for Acqua of the Back, member of God's Right Seat who was also a Saint, such a feat was easily manageable.

He was using the Divine Mother's Mercy to perform a miracle.

This is...!

Kanzaki easily deduced the mace surrounded by a bluish-white glow currently possessed a tremendous amount of energy.

Toaru Majutsu no Index vol.16 ch.3 pt.3