Buy Artifact Claim

is_available = has_perk = accomplished_forger_perk
trigger_if = {
	limit = {
		is_ai = yes
	}
	ai_greed >= high_positive_ai_value
	piety > major_piety_value
	is_playable_character = yes
	is_imprisoned = no
	prestige > major_prestige_value
	is_available_ai_adult = yes
}
is_landless_adventurer = no
is_shown = NOR = {
	scope:recipient = scope:actor
	scope:recipient = {
		is_imprisoned_by = scope:actor
	}
}
scope:recipient = {
	in_diplomatic_range = scope:actor
	any_character_artifact = {
		exists = this
		scope:actor = {
			NOT = {
				has_personal_artifact_claim = prev
			}
		}
		NOR = {
			has_variable = pope_hat
			artifact_type = wall_big
		}
	}
}
scope:recipient = {
	trigger_if = {
		limit = {
			exists = involved_activity
		}
		NOT = {
			involved_activity ?= {
				has_activity_type = activity_coronation
				activity_host ?= scope:recipient
			}
		}
	}
}

As written in game/common/character_interactions/00_artifact_interactions.txt.

NOR = {
	scope:recipient = scope:actor
	scope:recipient = {
		is_imprisoned_by = scope:actor
	}
}
scope:recipient = {
	any_character_artifact = {
		exists = this
		scope:actor = {
			NOT = {
				has_personal_artifact_claim = prev
			}
		}
	}
}
trigger_if = {
	limit = {
		scope:target ?= {
			is_holy_relic_for = scope:actor.faith
		}
	}
	trigger_if = {
		limit = {
			scope:target = {
				rarity = common
			}
		}
		scope:actor = {
			piety >= minor_buy_claim_piety_value
		}
	}
	trigger_else_if = {
		limit = {
			scope:target = {
				rarity = masterwork
			}
		}
		scope:actor = {
			piety >= medium_buy_claim_piety_value
		}
	}
	trigger_else_if = {
		limit = {
			scope:target = {
				rarity = famed
			}
		}
		scope:actor = {
			piety >= major_buy_claim_piety_value
		}
	}
	trigger_else = {
		scope:actor = {
			piety >= massive_buy_claim_piety_value
		}
	}
}
trigger_else = {
	trigger_if = {
		limit = {
			scope:target ?= {
				rarity = common
			}
		}
		scope:actor = {
			prestige >= minor_buy_claim_prestige_value
		}
	}
	trigger_else_if = {
		limit = {
			scope:target ?= {
				rarity = masterwork
			}
		}
		scope:actor = {
			prestige >= medium_buy_claim_prestige_value
		}
	}
	trigger_else_if = {
		limit = {
			scope:target ?= {
				rarity = famed
			}
		}
		scope:actor = {
			prestige >= major_buy_claim_prestige_value
		}
	}
	trigger_else = {
		scope:actor = {
			prestige >= massive_buy_claim_prestige_value
		}
	}
}

As written in game/common/character_interactions/00_artifact_interactions.txt.

on_accept = if = {
	limit = {
		scope:target = {
			is_holy_relic_for = scope:actor.faith
		}
	}
	scope:actor = {
		send_interface_toast = {
			type = event_artifact_good
			title = bought_artifact_claim.t
			left_icon = scope:recipient
			right_icon = scope:target
			if = {
				limit = {
					scope:target = {
						is_holy_relic_for = scope:actor.faith
						rarity = common
					}
				}
				scope:actor = {
					add_piety = minor_buy_claim_piety_loss
				}
			}
			else_if = {
				limit = {
					scope:target = {
						is_holy_relic_for = scope:actor.faith
						rarity = masterwork
					}
				}
				scope:actor = {
					add_piety = medium_buy_claim_piety_loss
				}
			}
			else_if = {
				limit = {
					scope:target = {
						is_holy_relic_for = scope:actor.faith
						rarity = famed
					}
				}
				scope:actor = {
					add_piety = major_buy_claim_piety_loss
				}
			}
			else_if = {
				limit = {
					scope:target = {
						is_holy_relic_for = scope:actor.faith
						rarity = illustrious
					}
				}
				scope:actor = {
					add_piety = massive_buy_claim_piety_loss
				}
			}
			add_personal_artifact_claim = scope:target
		}
	}
	scope:recipient = {
		send_interface_message = {
			type = event_artifact_bad_text
			title = sold_artifact_claim.t
			desc = sold_artifact_claim.desc
			left_icon = scope:actor
			right_icon = scope:target
		}
	}
}
else = {
	scope:actor = {
		send_interface_toast = {
			type = event_artifact_good
			title = bought_artifact_claim.t
			left_icon = scope:recipient
			right_icon = scope:target
			if = {
				limit = {
					exists = scope:target
					scope:target = {
						rarity = common
					}
				}
				scope:actor = {
					add_prestige = minor_buy_claim_prestige_loss
				}
			}
			else_if = {
				limit = {
					exists = scope:target
					scope:target = {
						rarity = masterwork
					}
				}
				scope:actor = {
					add_prestige = medium_buy_claim_prestige_loss
				}
			}
			else_if = {
				limit = {
					exists = scope:target
					scope:target = {
						rarity = famed
					}
				}
				scope:actor = {
					add_prestige = major_buy_claim_prestige_loss
				}
			}
			else_if = {
				limit = {
					exists = scope:target
					scope:target = {
						rarity = illustrious
					}
				}
				scope:actor = {
					add_prestige = massive_buy_claim_prestige_loss
				}
			}
			add_personal_artifact_claim = scope:target
		}
	}
	scope:recipient = {
		send_interface_message = {
			type = event_artifact_bad_text
			title = sold_artifact_claim.t
			desc = sold_artifact_claim.desc
			left_icon = scope:actor
			right_icon = scope:target
		}
	}
}
scope:actor = {
	stress_and_fulfillment_impact = {
		just = medium_stress_impact_gain
		honest = medium_stress_impact_gain
	}
}
scope:recipient = {
	add_opinion = {
		target = scope:actor
		modifier = claimed_my_artifact_opinion
		opinion = -40
	}
	if = {
		limit = {
			can_set_relation_potential_rival_trigger = {
				CHARACTER = scope:actor
			}
		}
		set_relation_potential_rival = scope:actor
	}
}
add_clan_unity_interaction_effect = {
	CHARACTER = scope:actor
	TARGET = scope:recipient
	VALUE = minor_unity_loss
	DESC = clan_unity_bought_artifact_claim.desc
	REVERSE_NON_HOUSE_TARGET = no
}

As written in game/common/character_interactions/00_artifact_interactions.txt.