Date: Unspecified
Time: Unspecified
Location: Myriad Realms, Card World, Northern Region, Northern Capital
All five regions were protected by their own greater array formations, thin veils designed to detect Card Emperors and trespassers of higher realms. Each city also possessed its own major array formation. These arrays did far more than simple detection; they protected and defended the cities and their citizens against any threats. This was especially true for the formations covering the capital cities.
They had been erected to defend against the monsters that emerged from the dungeons, but now they were being turned against card apprentices themselves.
Under normal circumstances, Card Emperors and Demigods could not simply walk into another region or city without being detected, unless they were equipped with black cards. These cards were used primarily by operatives of the four royal families and the central government when executing operations across regional boundaries.
