Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
All other "Ancient Warriors" monsters you control cannot be destroyed by battle. You can only use each of the following effects of "Ancient Warriors - Fearsome Zhang Yuan" once per turn. ● At the start of the Damage Step, when your "Ancient Warriors" monster battles an opponent's face-up monster: You can Special Summon this card from your hand, and if you do, that opponent's monster loses 1000 ATK. ● If a card(s) your opponent controls is destroyed by battle or card effect: You can target 1 card your opponent controls; destroy it.
--戦華の来－張遠
--Ancient Warriors - Fearsome Zhang Yuan
--Scripted by Larry126
local s,id=GetID()
function s.initial_effect(c)
	--Special summon and decrease ATK
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON+CATEGORY_ATKCHANGE)
	e1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e1:SetCode(EVENT_BATTLE_START)
	e1:SetRange(LOCATION_HAND)
	e1:SetCountLimit(1,id)
	e1:SetCondition(s.condition)
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
	--Prevnet destruction by battle
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetCode(EFFECT_INDESTRUCTABLE_BATTLE)
	e2:SetRange(LOCATION_MZONE)
	e2:SetTargetRange(LOCATION_MZONE,0)
	e2:SetTarget(s.tg)
	e2:SetValue(1)
	c:RegisterEffect(e2)
	--Destroy 1 target on the field
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,1))
	e3:SetCategory(CATEGORY_DESTROY)
	e3:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e3:SetCode(EVENT_DESTROYED)
	e3:SetProperty(EFFECT_FLAG_DELAY+EFFECT_FLAG_DAMAGE_STEP+EFFECT_FLAG_CARD_TARGET)
	e3:SetRange(LOCATION_MZONE)
	e3:SetCountLimit(1,{id,1})
	e3:SetCondition(s.descon)
	e3:SetTarget(s.destg)
	e3:SetOperation(s.desop)
	c:RegisterEffect(e3)
end
s.listed_series={SET_ANCIENT_WARRIORS}
function s.condition(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetAttacker()
	local bc=Duel.GetAttackTarget()
	if not bc then return false end
	if tc:IsControler(1-tp) then bc,tc=tc,bc end
	e:SetLabelObject(bc)
	return bc:IsFaceup() and tc:IsFaceup() and tc:IsSetCard(SET_ANCIENT_WARRIORS)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and e:GetHandler():IsCanBeSpecialSummoned(e,0,tp,false,false) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,e:GetHandler(),1,0,0)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if not c:IsRelateToEffect(e) then return end
	if Duel.SpecialSummon(c,0,tp,tp,false,false,POS_FACEUP)>0 then
		local bc=e:GetLabelObject()
		if bc:IsRelateToBattle() and bc:IsFaceup() and bc:IsControler(1-tp) then
			local e1=Effect.CreateEffect(e:GetHandler())
			e1:SetType(EFFECT_TYPE_SINGLE)
			e1:SetCode(EFFECT_UPDATE_ATTACK)
			e1:SetValue(-1000)
			e1:SetReset(RESET_EVENT|RESETS_STANDARD)
			bc:RegisterEffect(e1)
		end
	end
end
function s.tg(e,c)
	return c:IsSetCard(SET_ANCIENT_WARRIORS) and c~=e:GetHandler()
end
function s.cfilter(c,tp)
	return c:IsPreviousLocation(LOCATION_ONFIELD) and c:GetPreviousControler()==1-tp and c:IsReason(REASON_BATTLE|REASON_EFFECT)
end
function s.descon(e,tp,eg,ep,ev,re,r,rp)
	return eg:IsExists(s.cfilter,1,nil,tp)
end
function s.destg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsOnField() and chkc:IsControler(1-tp) end
	if chk==0 then return Duel.IsExistingTarget(aux.TRUE,tp,0,LOCATION_ONFIELD,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_DESTROY)
	local g=Duel.SelectTarget(tp,aux.TRUE,tp,0,LOCATION_ONFIELD,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,g,1,0,0)
end
function s.desop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc and tc:IsRelateToEffect(e) then
		Duel.Destroy(tc,REASON_EFFECT)
	end
end