Simple event mod.

[TheeGreenBean]

So a few years ago there was a mod that I think was called "blobbing mod" or something similar that let AI and your nation expand a lot faster, and I had a lot of fun with it. Not trying to recreate the same mod, but I was hoping to give a bunch of buffs to all nations to hopefully make them want to expand more/be agressive, but I was having trouble actually implementing it.
country_event = {
id = more_expanding.1
title = "more_expanding"
desc = "more_expanding"
picture = TRADEGOODS_eventPicture

major = yes
major_trigger = {
is_year = 1444
}
option = {
name = more_expanding.1.a
different buffs
}
mean_time_to_happen = {
days = 1
}
Here's what I think the mod should roughly look like. I think there should be something in there so that it only fires once for each nation, but when I tried to test it out, it didn't fire at all. Anyone know what I'm doing wrong?

[grotaclas]

Do you have the following lines at the top of your event file?

namespace = more_expanding
normal_or_historical_nations = yes

You might also need a trigger, because major_trigger only specifies who should get a notification when somebody else gets the event. And you probably don't want the major=yes line, because you don't want a notification if somebody else gets it.
But which buffs do you want to give? If you want to give modifiers in an event, you have to specify the modifier somewhere else and then use an effect which gives the modifier. If you only want modifiers, it would probably be better to add them to common/static_modifiers/00_static_modifiers.txt (e.g. base_values if all countries should get them).

[TheeGreenBean]

I did not have those lines at the top, but your idea about the base values sounded a lot better. It worked, so thanks for the help!

[TheeGreenBean]

One of the things I changed was core_creation_cost, which was set to -0.99. But for some reason I'm trying to core a province and it still costs 109 adm. Do you know how to change this?

[grotaclas]

core_creation_cost is not the right code for a modifier. You can look up existing modifiers in the game files or look at the wiki(but the wiki list is missing a few modifiers and it might contain some outdated ones): https://eu4.paradoxwikis.com/Modifier_list

[TheeGreenBean]

Thanks for the help again. I was using that list but for some reason I added on the "_cost"