Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If this card is Normal Summoned: Special Summon 1 "Mecha Phantom Beast Token" (Machine/WIND/Level 3/ATK 0/DEF 0). This card's Level is increased by the total Levels of all "Mecha Phantom Beast Tokens" you control. While you control a Token, this card cannot be destroyed by battle or card effects. Once per battle, during the Damage Step, when this card battles an opponent's monster (Quick Effect): You can Tribute 1 Token; this card gains 800 ATK, until the end of this turn.
--幻獣機テザーウルフ
--Mecha Phantom Beast Tetherwolf
local s,id=GetID()
function s.initial_effect(c)
	--Special Summon 1 "Mecha Phantom Beast Token" (Machine/WIND/Level 3/ATK 0/DEF 0)
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON+CATEGORY_TOKEN)
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_F)
	e1:SetCode(EVENT_SUMMON_SUCCESS)
	e1:SetTarget(s.sptg)
	e1:SetOperation(s.spop)
	c:RegisterEffect(e1)
	--This card's Level is increased by the total Levels of all "Mecha Phantom Beast Tokens" you control
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE)
	e2:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e2:SetCode(EFFECT_UPDATE_LEVEL)
	e2:SetRange(LOCATION_MZONE)
	e2:SetValue(function(e,c) return Duel.GetMatchingGroup(aux.FaceupFilter(Card.IsCode,TOKEN_MECHA_PHANTOM_BEAST),c:GetControler(),LOCATION_MZONE,0,nil):GetSum(Card.GetLevel) end)
	c:RegisterEffect(e2)
	--While you control a Token, this card cannot be destroyed by battle or card effects
	local e3=Effect.CreateEffect(c)
	e3:SetType(EFFECT_TYPE_SINGLE)
	e3:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e3:SetCode(EFFECT_INDESTRUCTABLE_BATTLE)
	e3:SetRange(LOCATION_MZONE)
	e3:SetCondition(s.indcon)
	e3:SetValue(1)
	c:RegisterEffect(e3)
	local e4=e3:Clone()
	e4:SetCode(EFFECT_INDESTRUCTABLE_EFFECT)
	c:RegisterEffect(e4)
	--Make this card gain 800 ATK, until the end of that turn
	local e5=Effect.CreateEffect(c)
	e5:SetDescription(aux.Stringid(id,1))
	e5:SetCategory(CATEGORY_ATKCHANGE)
	e5:SetType(EFFECT_TYPE_QUICK_O)
	e5:SetProperty(EFFECT_FLAG_DAMAGE_STEP)
	e5:SetCode(EVENT_FREE_CHAIN)
	e5:SetRange(LOCATION_MZONE)
	e5:SetHintTiming(TIMING_DAMAGE_STEP)
	e5:SetCondition(s.atkcon)
	e5:SetCost(s.atkcost)
	e5:SetOperation(s.atkop)
	c:RegisterEffect(e5)
end
s.listed_names={TOKEN_MECHA_PHANTOM_BEAST}
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetOperationInfo(0,CATEGORY_TOKEN,nil,1,tp,0)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,0)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	if Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsPlayerCanSpecialSummonMonster(tp,TOKEN_MECHA_PHANTOM_BEAST,SET_MECHA_PHANTOM_BEAST,TYPES_TOKEN,0,0,3,RACE_MACHINE,ATTRIBUTE_WIND) then
		local token=Duel.CreateToken(tp,TOKEN_MECHA_PHANTOM_BEAST_TETHERWOLF)
		Duel.SpecialSummon(token,0,tp,tp,false,false,POS_FACEUP)
	end
end
function s.tknfilter(c)
	return c:IsType(TYPE_TOKEN) or c:IsOriginalType(TYPE_TOKEN)
end
function s.indcon(e)
	return Duel.IsExistingMatchingCard(s.tknfilter,e:GetHandlerPlayer(),LOCATION_ONFIELD,0,1,nil)
end
function s.atkcon(e,tp,eg,ep,ev,re,r,rp)
	local bc=e:GetHandler():GetBattleTarget()
	return Duel.IsPhase(PHASE_DAMAGE) and not Duel.IsDamageCalculated() and bc and bc:IsControler(1-tp)
end
function s.atkcost(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return not c:HasFlagEffect(id) and Duel.CheckReleaseGroupCost(tp,Card.IsType,1,false,nil,nil,TYPE_TOKEN) end
	local g=Duel.SelectReleaseGroupCost(tp,Card.IsType,1,1,false,nil,nil,TYPE_TOKEN)
	Duel.Release(g,REASON_COST)
	c:RegisterFlagEffect(id,RESET_EVENT|RESETS_STANDARD|RESET_PHASE|PHASE_DAMAGE_CAL,0,1)
end
function s.atkop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:IsRelateToEffect(e) and c:IsFaceup() then
		c:UpdateAttack(800,RESETS_STANDARD_DISABLE_PHASE_END)
	end
end