Every monster in this series has a major role in their respective card storylines.
Sophia, Goddess of Rebirth
"Sophia, Goddess of Rebirth" was the "Planetforger" of the Duel Terminal World, who would perpetually destroy and recreate the world to achieve perfection. As the Great War reached its peek, "Sophia" reawakens from the "Shrine of Mist Valley" to purify the world once more, but is ultimately defeated by "Constellar Sombre" and "Evilswarm Kerykeion", putting an end to the cycle.
Tierra, Source of Destruction
"Tierra, Source of Destruction" was a god of the Duel Terminal World who was defeated and sealed by "Sophia" in ancient times. After many years of planning and slowly regaining its energy, and by manipulating many of the residents of the world, "Tierra" is resurrected as "Infernoid Tierra". Using its power to absorb the 10 "Qliphorts" and "Darktellarknight Batlamyus", it finally regains its original form, seeking to destroy the planet. After a long battle, it is finally defeated by "Zefraath".
Avida, Rebuilder of Worlds
- Master Guide 4 card storylines - File No. 03: The Thereafter of the DT World
- Duel Terminal Master Guide card storylines - DUEL TERMINAL WORLD HISTORY - AGE 2.0: The "Laval" Invasion of "Gem-Knight" Territory to the Repulsion of "Sophia, Goddess of Rebirth"
- Master Guide 5 card storylines
- Master Guide 6 card storylines - File No. 01: World Legacy