Crusader.kings.ii.holy.fury.update.v3.1.0-codex... Instant

Most features can be tested or managed via the Console Commands (typically opened with the ` or ~ key).

The v3.1.0 patch brought critical balancing to prevent certain mechanics from becoming overpowered:

Added the Arberian culture and its unique retinue, while also ensuring that certain religious doctrines, like "Cosmopolitan" and "Religious Tax," are no longer incompatible. Technical & Gameplay Notes Crusader.Kings.II.Holy.Fury.Update.v3.1.0-CODEX...

Before the v3.1.0 specific tweaks, the base expansion introduced several game-changing systems available on the Crusader Kings II Wiki:

Catholic rulers must now seek official Coronations from the clergy, while exceptionally pious characters can be canonized as Saints after death. Key Changes in Update v3.1.0 Most features can be tested or managed via

Tribal Pagan rulers can now seek a sponsor from an organized faith (like Christianity or Islam) to convert their entire realm at once, bypassing the slower province-by-province method. [TOOL] CK2 Holy Fury Map Generator - Paradox Forum

Pagan characters can join exclusive martial societies to climb ranks, unlock powerful combat bonuses, and call upon spiritual allies. Key Changes in Update v3

If using the "Random World" feature, players can use specialized map generation tools to further customize their seeds.