CK3 DatabaseCrusader Kings III · 1.20.0.3 “Crozier” · unofficial

Casus belli · Artifacts

Artifact

The war is called “Artifact Claim War”

Artifact is a casus belli in Crusader Kings III (artifacts). If the attacker wins: You take ownership of all Artifacts that you have a claim on belonging to the defender and their Vassals. If the defender wins: No Artifacts change hands. Declaring it costs prestige. The war goal is worth 80% war score. Patch 1.20.0.3, from game/common/casus_belli_types/01_ep1_wars.txt.

Quick answers (3)
What do you get for winning a Artifact war in CK3?
You take ownership of all Artifacts that you have a claim on belonging to the defender and their Vassals (patch 1.20.0.3).
What happens on a white peace?
No Artifacts change hands.
What does the Artifact casus belli cost?
prestige; the amount depends on the titles, claims and distance, worked out when you declare.

How the war ends

Attacker wins

You take ownership of all Artifacts that you have a claim on belonging to the defender and their Vassals.

White peace

No Artifacts change hands.

Defender wins

No Artifacts change hands.

If the war becomes invalid

Artifact Claim War invalidated!

Who can declare it

The game shows no text of its own for these conditions; the script is below.

Every artifacts war (the group's allowed_for_character) (2 lines of game script)
herders_and_tributary_constraints = yes
pam_personal_pacifism_offensive_war_ban_trigger = yes

As written in game/common/casus_belli_groups/00_casus_belli_groups.txt.

Attacker (allowed_for_character) (4 lines of game script)
has_any_artifact_claim = yes
NOT = {
	government_has_flag = government_is_landless_adventurer
}

As written in game/common/casus_belli_types/01_ep1_wars.txt.

Defender (allowed_against_character) (20 lines of game script)
scope:attacker = {
	OR = {
		any_personal_claimed_artifact = {
			artifact_war_claimable_artifact_trigger = yes
		}
		house ?= {
			any_house_claimed_artifact = {
				artifact_war_claimable_artifact_trigger = yes
				artifact_owner = {
					trigger_if = {
						limit = {
							exists = house
						}
						house != scope:attacker.house
					}
				}
			}
		}
	}
}

As written in game/common/casus_belli_types/01_ep1_wars.txt.

Cost to declare

Costs prestige. The amount is worked out when you declare (by the titles targeted, claims, distance and more), so the script is shown as written:

Cost (8 lines of game script)
prestige = {
	value = 0
	add = {
		value = medium_prestige_value
		desc = CB_BASE_COST
	}
	multiply = common_cb_prestige_cost_multiplier
}

As written in game/common/casus_belli_types/01_ep1_wars.txt.

Source: game/common/casus_belli_types/01_ep1_wars.txt and the English localisation, Crusader Kings III 1.20.0.3. “The attacker”, “the defender” stand where the game names the character; “…” marks other words it fills in during play.