Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Cannot be Synchro Summoned. Must be Special Summoned (from your Extra Deck) by sending 2 monsters you control with a Level difference of 7 to the GY (1 Level 8 or higher Tuner and 1 non-Tuner Synchro Monster). If this card is Special Summoned: You can target up to 2 other cards on the field; destroy them. Once per turn, when a card or effect is activated that targets an "Ursarctic" card you control (Quick Effect): You can Tribute 1 monster from your hand or field; negate the activation.
--ベアルクティ－グラン＝シャリオ
--Ursarctic Grand Chariot
local s,id=GetID()
function s.initial_effect(c)
	--Must be properly summoned before reviving
	c:EnableReviveLimit()
	--Must be special summoned by its own method
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_UNCOPYABLE)
	e1:SetCode(EFFECT_SPSUMMON_CONDITION)
	c:RegisterEffect(e1)
	--Special summon procedure (from extra deck)
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetCode(EFFECT_SPSUMMON_PROC)
	e2:SetProperty(EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_UNCOPYABLE)
	e2:SetRange(LOCATION_EXTRA)
	e2:SetCondition(s.sprcon)
	e2:SetTarget(s.sprtg)
	e2:SetOperation(s.sprop)
	c:RegisterEffect(e2)
	--Destroy when flipped
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,1))
	e3:SetCategory(CATEGORY_DESTROY)
	e3:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e3:SetCode(EVENT_SPSUMMON_SUCCESS)
	e3:SetProperty(EFFECT_FLAG_DELAY+EFFECT_FLAG_DAMAGE_STEP+EFFECT_FLAG_CARD_TARGET)
	e3:SetTarget(s.destg)
	e3:SetOperation(s.desop)
	c:RegisterEffect(e3)
	--Negate when effect targets your Ursarctic cards
	local e4=Effect.CreateEffect(c)
	e4:SetDescription(aux.Stringid(id,0))
	e4:SetCategory(CATEGORY_NEGATE)
	e4:SetType(EFFECT_TYPE_QUICK_O)
	e4:SetCode(EVENT_CHAINING)
	e4:SetProperty(EFFECT_FLAG_DAMAGE_STEP+EFFECT_FLAG_DAMAGE_CAL)
	e4:SetRange(LOCATION_MZONE)
	e4:SetCountLimit(1)
	e4:SetCondition(s.discon)
	e4:SetCost(aux.CostWithReplace(s.discost,CARD_URSARCTIC_BIG_DIPPER))
	e4:SetTarget(s.distg)
	e4:SetOperation(s.disop)
	c:RegisterEffect(e4)
end
s.listed_series={SET_URSARCTIC}
function s.sprfilter(c)
	return c:IsFaceup() and c:IsAbleToGraveAsCost() and c:HasLevel()
end
function s.sprfilter1(c,tp,g,sc)
	local lv=c:GetLevel()
	local g=Duel.GetMatchingGroup(s.sprfilter,tp,LOCATION_MZONE,0,nil)
	return c:IsType(TYPE_TUNER) and c:IsLevelAbove(8) and g:IsExists(s.sprfilter2,1,c,tp,c,sc)
end
function s.sprfilter2(c,tp,mc,sc)
	local sg=Group.FromCards(c,mc)
	return math.abs(c:GetLevel()-mc:GetLevel())==7 and c:IsType(TYPE_SYNCHRO) and not c:IsType(TYPE_TUNER) and Duel.GetLocationCountFromEx(tp,tp,sg,sc)>0
end
function s.sprcon(e,c)
	if c==nil then return true end
	local tp=c:GetControler()
	local g=Duel.GetMatchingGroup(s.sprfilter,tp,LOCATION_MZONE,0,nil)
	return g:IsExists(s.sprfilter1,1,nil,tp,g,c)
end
function s.sprtg(e,tp,eg,ep,ev,re,r,rp,c)
	local c=e:GetHandler()
	local g=Duel.GetMatchingGroup(s.sprfilter,tp,LOCATION_MZONE,0,nil)
	local g1=g:Filter(s.sprfilter1,nil,tp,g,c)
	local mg1=aux.SelectUnselectGroup(g1,e,tp,1,1,nil,1,tp,HINTMSG_TOGRAVE,nil,nil,true)
	if #mg1>0 then
		local mc=mg1:GetFirst()
		local g2=g:Filter(s.sprfilter2,mc,tp,mc,c,mc:GetLevel())
		local mg2=aux.SelectUnselectGroup(g2,e,tp,1,1,nil,1,tp,HINTMSG_TOGRAVE,nil,nil,true)
		mg1:Merge(mg2)
	end
	if #mg1==2 then
		mg1:KeepAlive()
		e:SetLabelObject(mg1)
		return true
	end
	return false
end
function s.sprop(e,tp,eg,ep,ev,re,r,rp,c)
	local g=e:GetLabelObject()
	if not g then return end
	Duel.SendtoGrave(g,REASON_COST)
end
function s.destg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	local c=e:GetHandler()
	if chkc then return chkc:IsLocation(LOCATION_ONFIELD) end
	if chk==0 then return Duel.IsExistingTarget(aux.TRUE,tp,LOCATION_ONFIELD,LOCATION_ONFIELD,1,c) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_DESTROY)
	local g=Duel.SelectTarget(tp,aux.TRUE,tp,LOCATION_ONFIELD,LOCATION_ONFIELD,1,2,c)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,g,#g,0,0)
end
function s.desop(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetTargetCards(e)
	if #g>0 then
		Duel.Destroy(g,REASON_EFFECT)
	end
end
function s.disfilter(c,tp)
	return c:IsFaceup() and c:IsLocation(LOCATION_ONFIELD) and c:IsControler(tp) and c:IsSetCard(SET_URSARCTIC)
end
function s.discon(e,tp,eg,ep,ev,re,r,rp)
	if e:GetHandler():IsStatus(STATUS_BATTLE_DESTROYED) then return false end
	if not re:IsHasProperty(EFFECT_FLAG_CARD_TARGET) then return false end
	local tg=Duel.GetChainInfo(ev,CHAININFO_TARGET_CARDS)
	return tg and tg:IsExists(s.disfilter,1,nil,tp) and Duel.IsChainNegatable(ev)
end
function s.discost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.CheckReleaseGroupCost(tp,nil,1,true,nil,nil) end
	local sg=Duel.SelectReleaseGroupCost(tp,nil,1,1,true,nil,nil)
	Duel.Release(sg,REASON_COST)
end
function s.distg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetOperationInfo(0,CATEGORY_NEGATE,eg,1,0,0)
end
function s.disop(e,tp,eg,ep,ev,re,r,rp)
	Duel.NegateActivation(ev)
end