pam_challenge_hof_war_on_attacker_victory_events_effect

pam_challenge_hof_war_on_attacker_victory_events_effect = {
	scope:attacker.faith.religious_head ?= {
		save_scope_as = pam_ch_hof_new_hof
		set_variable = {
			name = pam_ch_hof_var_carrier
			value = scope:defender
			days = 30
		}
		# Only now do we know the new Head of Faith
		scope:defender = {
			set_variable = {
				name = pam_ch_hof_new_hof
				value = scope:pam_ch_hof_new_hof
				days = 30
			}
		}
		# The event finds the war's people through the old Head of Faith
		if = {
			limit = {
				exists = scope:attacker
				scope:attacker = { is_ai = no }
			}
			scope:attacker = {
				set_variable = {
					name = pam_ch_hof_var_carrier
					value = scope:defender
					days = 30
				}
				trigger_event = {
					id = pam_antipope_events.0012
					days = 1
				}
			}
		}
		else_if = {
			limit = { is_ai = no }
			trigger_event = {
				id = pam_antipope_events.0012
				days = 1
			}
		}
		else = {
			pam_challenge_hof_war_ai_attacker_victory_judgment_effect = yes
			pam_challenge_hof_war_fire_followup_events_effect = yes
		}
	}
}

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