Build a twelve-card deck and win two of three lanes over six turns. Sixth Sigil is a free fantasy card battler with guest play and a story campaign. No account is needed to try a match. Still in development. Art and narrative text use AI; code is AI-assisted.
Sixth Sigil was submitted to SlowDen by TheReddestWizard. SlowDen did not make this game - it is published here from the developer's own submission, added on 2026-09-28. It runs in the browser with no download, no install and no sign-up.