- **Time and space background**: In the fictional "Arcane Era" world, magic energy is embodied in the form of cards, and card masters control card battles through spiritual resonance.
- **Core Settings**:
- **Crystal Vein System**: The magic circuit flowing in the human body determines the level of the card player (black iron/silver/gold/legendary)
- **Fantasy Beast Ecology**: Magical creatures from F level to SSS level, which can be sealed as cards or used as independent combat forces
- **Void Dungeon**: A randomly appearing battlefield in a different space, containing the heritage of ancient civilizations and rare card formulas
