Devourer of a Thousand Worlds

From publisher blurb:

The end has come! Saitan, the Deliverer of Omega has arrived with the intent of reducing the world to ash. The heroes must take to the skies and fight their way up to Saitan’s planet-sized home in a salvaged ship, and confront the titan head on! But greater powers still intervene in the fight, and amid exploring a Saitan’s impossibly huge vessel, the party is drawn into another world entirely. In this surreal landscape, the heroes must stand toe-to-toe with entities that shape reality and probability itself and prove they have what it takes to face the titan and stop her once and for all!

A Pathfinder-compatible adventure for a party of four 12th-level characters.