petition_head_of_faith_excommunication_offer_gold_effect

petition_head_of_faith_excommunication_offer_gold_effect = {
	add_character_flag = petition_head_of_faith_argument_finesse
	if = {
		# Venal Head of Faith skips the duel.
		limit = { petition_head_of_faith_recipient_venal_trigger = yes }
		petition_head_of_faith_excommunication_offer_gold_success_effect = yes
	}
	else = {
		duel = {
			skill = diplomacy
			target = var:petition_head_of_faith_recipient
			# Base 10/10 = 50% at equal skill, neutral disposition
			10 = {
				desc = petition_head_of_faith_duel_success
				compare_modifier = {
					value = scope:duel_value
					multiplier = 1
				}
				modifier = {
					top_participant_group:the_christian_church ?= {
						has_participant_group_parameter = the_christian_church_more_likely_to_accept_request_excommunications
					}
					add = 5
				}
				modifier = {
					petition_head_of_faith_disposition_favorable_trigger = yes
					add = 5
				}
				modifier = {
					petition_head_of_faith_disposition_skeptical_trigger = yes
					add = -3
				}
				modifier = {
					petition_head_of_faith_disposition_hostile_trigger = yes
					add = -8
				}
				min = 1
				petition_head_of_faith_excommunication_offer_gold_success_effect = yes
			}
			10 = {
				desc = petition_head_of_faith_argument_affronted
				compare_modifier = {
					value = scope:duel_value
					multiplier = -1
				}
				petition_head_of_faith_excommunication_affront_failure_effect = yes
			}
		}
	}
}

As written in game/common/scripted_effects/11_petition_head_of_faith_effects.txt.