Apocrypha

Apocrypha are considered as unofficial Testaments in the Septian Church.

Background
Even within the Septian Church, access to the Apocrypha are limited; only members of the Gralsritter are allowed to browse them. One of these is the Book of Ladder (ラダー記), which describes the Pleroma Grass as a mysterious flower that can be interpreted as a good omen or a bad omen.