Don't give me that look. It interacts well enough with CK2 Plus in every other way, I dunno why it messes with the realm shatter.
It overwrites our stuff probably the on_actions file.
If there is one file that I would say is essential it would be that file. You can easily remove any other event or decision file without losing much, but this is the thing that holds a lot of stuff together.
Why? The startup script is in that file, meaning NOTHING of Plus rules will work and NOT A SINGLE flag used by Plus will be set, realms will use default laws... etc.
And that's just first four lines of startup.
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