Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
You can target 1 Continuous Spell/Trap you control; send it to the GY, and if you do, halve the ATK of 2 face-up monsters on the field, until the end of this turn. If a card(s) your opponent controls is destroyed by battle or card effect: You can target 1 "Ancient Warriors" card in your GY, except "Ancient Warriors - Deceptive Jia Wen"; add it to your hand. You can only use each effect of "Ancient Warriors - Deceptive Jia Wen" once per turn.
--戦華の詭－賈文
--Ancient Warriors - Deceptive Jia Wen
--Scripted by Naim
local s,id=GetID()
function s.initial_effect(c)
	--Send a card to the GY and decrease ATK
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_TOGRAVE+CATEGORY_ATKCHANGE)
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCountLimit(1,id)
	e1:SetTarget(s.atktg)
	e1:SetOperation(s.atkop)
	c:RegisterEffect(e1)
	--Add a target from the GY to the hand
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_TOHAND)
	e2:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e2:SetProperty(EFFECT_FLAG_DELAY+EFFECT_FLAG_DAMAGE_STEP+EFFECT_FLAG_CARD_TARGET)
	e2:SetCode(EVENT_DESTROYED)
	e2:SetRange(LOCATION_MZONE)
	e2:SetCountLimit(1,{id,1})
	e2:SetCondition(s.thcond)
	e2:SetTarget(s.thtg)
	e2:SetOperation(s.thop)
	c:RegisterEffect(e2)
end
s.listed_names={id}
s.listed_series={SET_ANCIENT_WARRIORS}
function s.tgfilter(c)
	return c:IsFaceup() and c:IsType(TYPE_CONTINUOUS) and c:IsSpellTrap() and c:IsAbleToGrave()
end
function s.atkfilter(c)
	return c:IsFaceup() and c:GetAttack()>0
end
function s.atktg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chkc then return chkc:IsOnField() and chkc:IsControler(tp) and s.tgfilter(chkc) end
	if chk==0 then return Duel.IsExistingTarget(s.tgfilter,tp,LOCATION_ONFIELD,0,1,nil)
		and Duel.IsExistingMatchingCard(s.atkfilter,tp,LOCATION_MZONE,LOCATION_MZONE,2,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TOGRAVE)
	local g=Duel.SelectTarget(tp,s.tgfilter,tp,LOCATION_ONFIELD,0,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_TOGRAVE,g,1,0,0)
	Duel.SetOperationInfo(0,CATEGORY_ATKCHANGE,nil,2,0,0)
end
function s.atkop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) and Duel.SendtoGrave(tc,REASON_EFFECT)~=0 and tc:IsLocation(LOCATION_GRAVE) then
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATTACK)
		local sg=Duel.SelectMatchingCard(tp,s.atkfilter,tp,LOCATION_MZONE,LOCATION_MZONE,2,2,nil)
		if #sg>0 then
			Duel.HintSelection(sg)
			for card in aux.Next(sg) do
				local e1=Effect.CreateEffect(e:GetHandler())
				e1:SetType(EFFECT_TYPE_SINGLE)
				e1:SetCode(EFFECT_SET_ATTACK_FINAL)
				e1:SetValue(card:GetAttack()//2)
				e1:SetReset(RESETS_STANDARD_PHASE_END)
				card:RegisterEffect(e1)
			end
		end
	end
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.thcond(e,tp,eg,ep,ev,re,r,rp)
	return eg:IsExists(s.cfilter,1,nil,tp)
end
function s.thfilter(c)
	return c:IsSetCard(SET_ANCIENT_WARRIORS) and c:IsAbleToHand() and not c:IsCode(id)
end
function s.thtg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_GRAVE) and chkc:IsControler(tp) and s.thfilter(chkc) end
	if chk==0 then return Duel.IsExistingTarget(s.thfilter,tp,LOCATION_GRAVE,0,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATOHAND)
	local g=Duel.SelectTarget(tp,s.thfilter,tp,LOCATION_GRAVE,0,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_TOHAND,g,1,0,0)
end
function s.thop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc and tc:IsRelateToEffect(e) then
		Duel.SendtoHand(tc,nil,REASON_EFFECT)
	end
end