gok_realm_devastation_effect

gok_realm_devastation_effect = {
	#Minor issues targeting the general realm, but REALLY focus in on the capital area for revenge
	add_to_list = defender_realm_vassals
	#defender domain specifically targeted
	every_in_list = {
		list = target_titles
		limit = {
			tier = tier_county
			is_landless_type_title = no
		}
		add_to_list = devastation_area
	}
	#and area of capital
	capital_county.duchy = {
		every_de_jure_county = {
			limit = {
				holder = {
					top_liege = scope:defender
					NOR = {
						is_ai = no
						is_at_war_with = scope:defender
					}
				}
			}
			add_to_list = devastation_area
		}
	}
	every_vassal_or_below = {
		add_to_list = defender_realm_vassals
	}
	#is this violent retribution for refusing the khan's generosity?
	if = {
		limit = {
			exists = scope:khans_retribution_target
		}
		scope:attacker = {
			custom_tooltip = gok_gain_dread_tt
		}
		custom_tooltip = gok_ruin_additional_destruction_tt
		if = {
			limit = {
				government_has_flag = government_is_nomadic
				scope:defender.capital_county = {
					any_county_province = {
						OR = {
							has_holding_type = nomad_holding
							has_holding_type = herder_holding
						}
					}
				}
			}
			scope:attacker = {
				custom_tooltip = gok_gain_herd_tt
			}
		}
		else = {
			scope:attacker = {
				custom_tooltip = gok_gain_gold_tt
			}
		}
		hidden_effect = {
			scope:attacker = {
				#First off, gain dread
				add_dread = gok_retribution_dread_value
				#Gain herd or gold
				if = {
					limit = {
						government_has_flag = government_is_nomadic
						scope:defender.capital_county = {
							any_county_province = {
								OR = {
									has_holding_type = nomad_holding
									has_holding_type = herder_holding
								}
							}
						}
					}
					domicile = {
						change_herd = gok_retribution_herd_value
					}
				}
				else = {
					add_short_term_gold = gok_retribution_gold_value
				}
			}
			#Tank control everywhere
			every_sub_realm_county = {
				limit = {
					NOT = {
						is_in_list = devastation_area
					}
				}
				change_county_control = massive_county_control_loss
				change_development_level = {
					subtract = development_level
					multiply = 0.2
					floor = yes
				}
			}
			#Destroy the holdings
			every_in_list = {
				list = devastation_area
				limit = {
					any_county_province = {
						has_holding = yes
						is_county_capital = no
					}
				}
				every_county_province = {
					limit = {
						has_holding = yes
						is_county_capital = no
					}
					random = {
						chance = 50
						remove_holding = yes
						add_to_list = destroyed_holdings
					}

				}

As written in game/common/scripted_effects/09_mpo_greatest_of_khans_effects.txt.