Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Target 1 face-up Xyz Monster you control; Special Summon 3 "Umbral Horror Mirage Tokens" (Fiend-Type/DARK/Level 1/ATK ?/DEF 0). (When Summoned, each Token's ATK becomes equal to that Xyz Monster's current ATK. They cannot attack your opponent directly or be Tributed, except for a Tribute Summon.) When that face-up Xyz Monster leaves the field, destroy these tokens.
--罪鍵の法－シン・キー・ロウ
--Corrupted Keys
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON+CATEGORY_TOKEN)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetHintTiming(0,TIMING_END_PHASE)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
s.listed_names={67949764}
function s.filter(c,tp)
	return c:IsFaceup() and c:IsType(TYPE_XYZ)
		and Duel.IsPlayerCanSpecialSummonMonster(tp,id+1,SET_UMBRAL_HORROR,TYPES_TOKEN,-2,0,1,RACE_FIEND,ATTRIBUTE_DARK)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_MZONE) and chkc:IsControler(tp) and s.filter(chkc,tp) end
	if chk==0 then return not Duel.IsPlayerAffectedByEffect(tp,CARD_BLUEEYES_SPIRIT) and Duel.GetLocationCount(tp,LOCATION_MZONE)>2
		and Duel.IsExistingTarget(s.filter,tp,LOCATION_MZONE,0,1,nil,tp) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TARGET)
	Duel.SelectTarget(tp,s.filter,tp,LOCATION_MZONE,0,1,1,nil,tp)
	Duel.SetOperationInfo(0,CATEGORY_TOKEN,nil,3,0,0)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,3,tp,0)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	if Duel.IsPlayerAffectedByEffect(tp,CARD_BLUEEYES_SPIRIT) then return end
	local tc=Duel.GetFirstTarget()
	if Duel.GetLocationCount(tp,LOCATION_MZONE)>2 then
		local rfid=tc:GetRealFieldID()
		local atk=0
		local cr=false
		if tc and tc:IsFaceup() and tc:IsRelateToEffect(e) then
			atk=tc:GetAttack()
			cr=true
		end
		if not Duel.IsPlayerCanSpecialSummonMonster(tp,id+1,SET_UMBRAL_HORROR,TYPES_TOKEN,-2,0,1,RACE_FIEND,ATTRIBUTE_DARK) then return end
		if cr then
			local de=Effect.CreateEffect(e:GetHandler())
			de:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_CONTINUOUS)
			de:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
			de:SetCode(EVENT_LEAVE_FIELD)
			de:SetOperation(s.desop)
			de:SetLabel(rfid)
			tc:RegisterEffect(de,true)
		end
		for i=1,3 do
			local token=Duel.CreateToken(tp,id+1)
			Duel.SpecialSummonStep(token,0,tp,tp,false,false,POS_FACEUP)
			local e1=Effect.CreateEffect(e:GetHandler())
			e1:SetType(EFFECT_TYPE_SINGLE)
			e1:SetCode(EFFECT_CANNOT_DIRECT_ATTACK)
			e1:SetReset(RESET_EVENT|RESETS_STANDARD)
			token:RegisterEffect(e1,true)
			local e2=Effect.CreateEffect(e:GetHandler())
			e2:SetType(EFFECT_TYPE_SINGLE)
			e2:SetCode(EFFECT_UNRELEASABLE_NONSUM)
			e2:SetValue(1)
			e2:SetReset(RESET_EVENT|RESETS_STANDARD)
			token:RegisterEffect(e2,true)
			local e3=Effect.CreateEffect(e:GetHandler())
			e3:SetType(EFFECT_TYPE_SINGLE)
			e3:SetCode(EFFECT_SET_ATTACK)
			e3:SetValue(atk)
			e3:SetLabelObject(tc)
			e3:SetReset(RESET_EVENT|RESETS_STANDARD)
			token:RegisterEffect(e3,true)
			if cr then
				token:RegisterFlagEffect(id+1,RESET_EVENT|RESETS_STANDARD,0,0,rfid)
				tc:CreateRelation(token,RESET_EVENT|RESETS_STANDARD&~RESET_TURN_SET)
			end
		end
		Duel.SpecialSummonComplete()
	end
end
function s.desfilter(c,rfid)
	return c:GetFlagEffectLabel(id+1)==rfid
end
function s.desop(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetMatchingGroup(s.desfilter,tp,LOCATION_MZONE,0,nil,e:GetLabel())
	Duel.Destroy(g,REASON_EFFECT)
	e:Reset()
end