Location from A Practical Guide to Evil by ErraticErrata
The parallel realm of the Fae — a world of living stories where Winter and Summer courts cycle endlessly, until Catherine broke the cycle and made the Twilight Ways.
Arcadia is where the Fae live — beings made of story, organized into courts that cycle through eternal patterns. Winter represents villainy (ice, darkness, cruelty), Summer represents heroism (fire, growth, kindness). When one wins, it dies and the others take over, cycling endlessly. Catherine became part of the Winter Court, eventually became its Sovereign, then broke the cycle entirely by merging the courts. The Twilight Ways she created became invaluable for military transit — enter a gate, travel through Arcadia's compressed geography, exit at your destination. The Court of Twilight fulfilled her oath to Larat. Arcadia is the series' purest expression of its themes: stories have power, stories have rules, and someone clever enough can rewrite the rules.
A realm that looks like myth given geography — impossible landscapes that shift with narrative weight. Winter is ice and darkness and beautiful cruelty. Summer is fire and growth and terrible kindness. The Twilight Ways are something new: corridors between worlds that Catherine created by merging what came before.
Also known as: Arcadia, Twilight Ways