Rival Books of Aster — Steam game overview

Stored observation / content update: 2026-10-26T14:00:14.000Z

Rival Books of Aster is a strategy deck building game that features over 140 hand illustrated spells that you can use to build custom decks and go head to head against other players. Each spell is also a page in a living story book that translates itself and reveals its secrets as you play the game.

Game metrics below are stored observations; missing values are unknown.

Revenue is modelled, not confirmed sales. See the methodology and uncertainty range.