Each genre owns a border colour scale tied to intensity. World is the exception β its border carries the flag of the card's country or region rather than a solid colour.
This section covers the full genre system: the Intensity scale genres span, the Wheel that lays genres out by colour and adjacency, Associations (transitions and battle mashups between genres), Territories that back country-linked subgenres, per-genre Themes, and the Manage tab for editing the underlying taxonomy.