Quaternary Intrusion (Intrusión Cuaternaria) is a cosmological concept mentioned during the domestic crisis of Adam in Antiterra. Its nature is not explicitly expanded.
It may be a rupture or interference in the structure of reality (“quaternary” being the fourth dimension or a fourth cosmic level).
Open questions
- It may be linked to fractures between Eden and Antiterra, or to the power of Sariel or temptation penetrating a dual reality. This is speculation.