Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
2 Level 8 DARK monsters Must be Xyz Summoned. Once per turn (Quick Effect): You can detach 1 material from this card and send 1 card from your hand to the GY, then target 1 face-up card your opponent controls; change this card to Defense Position, and if you do, negate that targeted card's effects, until the end of this turn.
--Ｎｏ．２２ 不乱健
--Number 22: Zombiestein
local s,id=GetID()
function s.initial_effect(c)
	c:EnableReviveLimit()
	--Xyz Summon procedure: 2 Level 8 DARK monsters
	Xyz.AddProcedure(c,aux.FilterBoolFunctionEx(Card.IsAttribute,ATTRIBUTE_DARK),8,2)
	c:AddMustBeXyzSummoned()
	--Change this card to Defense Position, and if you do, negate the effects of 1 face-up card your opponent controls until the end of this turn
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_POSITION+CATEGORY_DISABLE)
	e1:SetType(EFFECT_TYPE_QUICK_O)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCountLimit(1)
	e1:SetHintTiming(0,TIMING_STANDBY_PHASE|TIMING_MAIN_END|TIMINGS_CHECK_MONSTER_E)
	e1:SetCost(Cost.AND(Cost.DetachFromSelf(1),s.discost))
	e1:SetTarget(s.distg)
	e1:SetOperation(s.disop)
	c:RegisterEffect(e1)
end
s.xyz_number=22
function s.discost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(Card.IsAbleToGraveAsCost,tp,LOCATION_HAND,0,1,nil) end
	Duel.DiscardHand(tp,Card.IsAbleToGraveAsCost,1,1,REASON_COST)
end
function s.distg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsControler(1-tp) and chkc:IsOnField() and chkc:IsNegatable() end
	local c=e:GetHandler()
	if chk==0 then return c:IsAttackPos() and c:IsCanChangePosition()
		and Duel.IsExistingTarget(Card.IsNegatable,tp,0,LOCATION_ONFIELD,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_NEGATE)
	local g=Duel.SelectTarget(tp,Card.IsNegatable,tp,0,LOCATION_ONFIELD,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_POSITION,c,1,tp,POS_DEFENSE)
	Duel.SetOperationInfo(0,CATEGORY_DISABLE,g,1,tp,0)
end
function s.disop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local tc=Duel.GetFirstTarget()
	if c:IsRelateToEffect(e) and c:IsAttackPos() and c:IsCanChangePosition()
		and Duel.ChangePosition(c,POS_FACEUP_DEFENSE,POS_FACEDOWN_DEFENSE,0,0)>0
		and tc:IsRelateToEffect(e) and tc:IsFaceup()then
		--Negate that targeted card's effects, until the end of this turn
		tc:NegateEffects(c,RESET_PHASE|PHASE_END,true)
	end
end