excommunication_cb_piety_change

excommunication_cb_piety_change = {

	#Amount of piety gain is scaled based on the highest tier title the defender has.
	if = {
		limit = {
			scope:defender.highest_held_title_tier >= tier_empire
		}
		$WINNER$ = {
			if = {
				limit = {
					$WINNER$ = scope:attacker
				}
				add_piety = {
					add = religious_cb_piety_gain_empire
					multiply = excommunication_cb_piety_change_multiplier
				}
			}
			else = {
				add_piety = religious_cb_piety_gain_empire
			}
		}
		$LOSER$ = {
			add_piety = religious_cb_piety_loss_empire
		}
	}

	else_if = {
		limit = {
			scope:defender.highest_held_title_tier = tier_kingdom
		}
		$WINNER$ = {
			if = {
				limit = {
					$WINNER$ = scope:attacker
				}
				add_piety = {
					add = religious_cb_piety_gain_kingdom
					multiply = excommunication_cb_piety_change_multiplier
				}
			}
			else = {
				add_piety = religious_cb_piety_gain_kingdom
			}
		}
		$LOSER$ = {
			add_piety = religious_cb_piety_loss_kingdom
		}
	}
	else_if = {
		limit = {
			scope:defender.highest_held_title_tier = tier_duchy
		}
		$WINNER$ = {
			if = {
				limit = {
					$WINNER$ = scope:attacker
				}
				add_piety = {
					add = religious_cb_piety_gain_duchy
					multiply = excommunication_cb_piety_change_multiplier
				}
			}
			else = {
				add_piety = religious_cb_piety_gain_duchy
			}
		}
		$LOSER$ = {
			add_piety = religious_cb_piety_loss_duchy
		}
	}
	else = {
		$WINNER$ = {
			if = {
				limit = {
					$WINNER$ = scope:attacker
				}
				add_piety = {
					add = religious_cb_piety_gain_county
					multiply = excommunication_cb_piety_change_multiplier
				}
			}
			else = {
				add_piety = religious_cb_piety_gain_county
			}
		}
		$LOSER$ = {
			add_piety = religious_cb_piety_loss_county
		}
	}
}

As written in game/common/scripted_effects/00_war_effects.txt.