PAC(Province Auto Core) System

PAC system is one of the most important part of Common Universalis, it's a whole new expansion mechanic which entirely changed the way game plays.

PAC system is made by a large series of events, after suppressing nationalism, converting religion and other events(and of course, patience), you'll gain the core of the province for free.

Though it's free, you might need some MIL points when suppressing nationalism, facing rebellions from all non-core provinces, leaving provinces in high autonomy and suffer the overextension penalties for the whole time.

Changes in core-creation system
There are things you might need to know in order to understand the PAC system:
 * Claims reduce 15% warscore/coring cost and local autonomy(-10% in vanilla)
 * War exhaustion no longer increase core creation cost
 * Non-core provinces receive +7 unrest and additional autonomy increase
 * Overextension still have penalties, but not fatal