pam_merge_new_ecclesiastical_title_interaction_effect

pam_merge_new_ecclesiastical_title_interaction_effect = {
	$ABSORBING_TITLE$ ?= {
		save_scope_as = absorbing_title
		holder ?= { save_scope_as = absorbing_holder }
	}
	$ABSORBED_TITLE$ = {
		save_scope_as = absorbed_title
		holder = {
			save_scope_as = absorbed_holder
			scope:absorbed_holder = {
				send_interface_toast = {
					type = event_toast_effect_bad
					title = request_ecclesiastical_title_merger_absorbed_tt
					left_icon = scope:absorbing_holder
					right_icon = scope:absorbed_title
					if = {
						limit = { is_ai = yes }
						# Absorbed region holder is angry at the initiator
						add_opinion = {
							target = $SENDER$
							modifier = angry_opinion
							opinion = -75
						}
						progress_towards_rival_effect = {
							CHARACTER = $SENDER$
							OPINION = 0
							REASON = rival_ecclesiastical_title_merged
						}
					}
				}
			}
		}
	}
	# Toast to the initiator
	$SENDER$ = {
		hidden_effect = {
			send_interface_toast = {
				type = event_toast_effect_good
				title = merge_new_ecclesiastical_title_toast
				left_icon = scope:absorbing_holder
				right_icon = scope:absorbed_title
				# Perform the region merge
				custom_tooltip = {
					text = merge_new_ecclesiastical_title_effect_tt
					scope:absorbing_title = {
						grow_clerical_region_from = scope:absorbed_title
						set_variable = {
							name = merge_clerical_region_cooldown
							years = merge_clerical_region_cooldown_years_value
						}
					}
				}
			}
		}
	}
	scope:absorbing_holder = {
		send_interface_toast = {
			type = event_toast_effect_good
			title = merge_new_ecclesiastical_title_toast
			left_icon = $SENDER$
			right_icon = scope:absorbed_title
			custom_tooltip = merge_new_ecclesiastical_title_effect_tt
			# The puppet variant sends on its own behalf, so there is no favour owed.
			if = {
				limit = { NOT = { this = $SENDER$ } }
				if = {
					limit = { is_ai = yes }
					add_opinion = {
						target = $SENDER$
						modifier = grateful_opinion
						opinion = 50
					}
				}
				$SENDER$ = {
					add_hook = {
						type = favor_hook
						target = scope:absorbing_holder
					}
				}
			}
		}
	}
}

As written in game/common/scripted_effects/pam_effects.txt.