A Certain Magical Index II - Episode 12 (Patreon)

Had to research more onto what Peter's Cross was, let me know if I got anything wrong.

The Cross of Peter is an item that “claims” an entire area on behalf of the Roman Catholic Church.

By claiming, it subtly alters people and events in that area that psychologically gears them towards joining the Roman Catholic Church.  It alters things in a way that the events appear natural.  It’s altering human thoughts and probability at the deepest level.

The night sky acts as the magic circle, with a very specific arrangement of constellations.  The sky is the circle, the cross is the tool for receiving the power.

The Cross activation date differs for each area.  For the Vatican, it’s June 29, the death of Saint Peter.  But for Academy City, it’s September 19.