code:

	if = {
		limit = {
			(stuff indicating we're fighting in a crusade)
			NOT = {
				check_variable = { which = crusadeCommander value = 0 }
			}
		}
		change_variable = { which = crusadeCommander value = 1 }
	}
	else_if = {
		limit = {
			(stuff indicating we're fighting in a crusade)
		}
		set_variable = { which = crusadeCommander value = 1 }
	}

	if = {
		limit = {
			check_variable = { which = crusadeCommander value = 20 }
			NOT = {
				any_owned_bloodline = {
					has_bloodline_flag = battle_survivor_bloodline
					ROOT = {
						is_bloodline_founder_of = PREV
					}
				}
			}
		}
		narrative_event = { id = HF.49021 }
	}