pam_antiking_victory_effect

pam_antiking_victory_effect = {
	pam_remove_sponsored_antipope_effect = {
		SPONSOR = scope:defender
		FAITH = scope:defender.faith
	}
	scope:attacker = {
		add_piety = major_piety_gain
		add_piety_level = 1
		if = {
			limit = {
				faith = {
					exists = religious_head
					religious_head != scope:attacker
				}
			}
			faith.religious_head = {
				add_opinion = {
					modifier = grateful_opinion
					target = scope:attacker
					opinion = 30
				}
			}
			add_hook_if_possible_default_length_effect = {
				TARGET = faith.religious_head
				TYPE = deposed_antipope_hook
			}
		}
		if = {
			limit = {
				has_personal_tenet_flag = tenet_apostolic_succession_antipope_opposition
			}
			add_legitimacy_effect = {
				LEGITIMACY = medium_legitimacy_gain
			}
			change_spiritual_fulfillment = medium_spiritual_fulfillment_value
		}
	}
	pam_antipope_removed_catalyst_effect = yes
}

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