Once a shining beacon of pilgrimage with sites like the Thirty-Two Hallowed Steps and the Golden Army of Var, Protasia fell into ruin during the Foulmind Heresy and the psychic revolt known as the Protasian Breach. Warp-gates torn open by rogue psykers unleashed Enslavers, while Alpha Legion fleets clashed with Battlefleet Calixis.
Today, Protasia endures as both shrine and war world: sacred ruins stand amid plague zones and psychic scars, guarded under martial law. Ecclesiarchy forces maintain strict oversight, and pilgrimages continue under watchful guns.
Ignis Aeternus WH 40K campaign notes 