damage_governor_efficiency_success_effect

damage_governor_efficiency_success_effect = {
	scope:recipient ?= {
		send_interface_toast = {
			type = event_toast_effect_bad
			title = damage_efficiency_success_desc
			left_icon = scope:actor
			if = {
				limit = { has_character_modifier = ep3_boost_efficiency_modifier }
				remove_character_modifier = ep3_boost_efficiency_modifier
				if = {
					limit = { var:ep3_governor_efficiency_stack = 1 }
					remove_variable = ep3_governor_efficiency_stack
				}
				else = {
					change_variable = {
						name = ep3_governor_efficiency_stack
						add = -1
					}
				}
			}
			else = {
				add_character_modifier = {
					modifier = ep3_damage_efficiency_modifier
					years = 10
				}
				if = {
					limit = { has_variable = ep3_governor_efficiency_stack }
					set_variable = {
						name = ep3_governor_efficiency_stack
						value = {
							value = scope:recipient.var:ep3_governor_efficiency_stack
							add = 1
							max = 5
						}
						years = 10
					}
				}
				else = {
					set_variable = {
						name = ep3_governor_efficiency_stack
						value = 1
						years = 10
					}
				}
			}
			if = {
				limit = { is_ai = yes }
				add_opinion = {
					target = scope:actor
					modifier = damaged_efficiency_opinion
				}
			}
		}
	}
}

As written in game/common/scripted_effects/07_dlc_ep3_scripted_effects.txt.