Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
This Special Summoned card cannot be destroyed by battle. You can only use each of the following effects of "Divine Dragon Titanomakhia" once per turn. You can banish 3 "Divine Dragon Titanomakhia" from your GY and/or face-up field, including this card on the field; destroy all cards your opponent controls. During the End Phase: You can send cards from the top of your Deck to your GY, equal to the number of Dragon monsters you control.
--神竜 ティタノマキア
--Divine Dragon Titanomakhia
--scripted by pyrQ
local s,id=GetID()
function s.initial_effect(c)
	--Cannot be destroyed by battle if Special Summoned
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_INDESTRUCTABLE_BATTLE)
	e1:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCondition(function(e) return e:GetHandler():IsSpecialSummoned() end)
	e1:SetValue(1)
	c:RegisterEffect(e1)
	--Destroy all cards your opponent controls
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetCategory(CATEGORY_DESTROY)
	e2:SetType(EFFECT_TYPE_IGNITION)
	e2:SetRange(LOCATION_MZONE)
	e2:SetCountLimit(1,{id,0})
	e2:SetCost(s.descost)
	e2:SetTarget(s.destg)
	e2:SetOperation(s.desop)
	c:RegisterEffect(e2)
	--Send cards from the top of your Deck to the GY
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,1))
	e3:SetCategory(CATEGORY_DECKDES)
	e3:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e3:SetCode(EVENT_PHASE+PHASE_END)
	e3:SetRange(LOCATION_MZONE)
	e3:SetCountLimit(1,{id,1})
	e3:SetTarget(s.tgtg)
	e3:SetOperation(s.tgop)
	c:RegisterEffect(e3)
end
s.listed_names={id}
function s.cfilter(c)
	return c:IsFaceup() and c:IsCode(id) and c:IsAbleToRemoveAsCost()
end
function s.rescon(sg,e,tp,mg)
	return sg:IsContains(e:GetHandler())
end
function s.descost(e,tp,eg,ep,ev,re,r,rp,chk)
	local g=Duel.GetMatchingGroup(s.cfilter,tp,LOCATION_MZONE|LOCATION_GRAVE,0,nil)
	if chk==0 then return #g>0 and aux.SelectUnselectGroup(g,e,tp,3,3,s.rescon,0) end
	local rg=aux.SelectUnselectGroup(g,e,tp,3,3,s.rescon,1,tp,HINTMSG_REMOVE)
	Duel.Remove(rg,POS_FACEUP,REASON_COST)
end
function s.destg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(nil,tp,0,LOCATION_ONFIELD,1,nil) end
	local sg=Duel.GetMatchingGroup(nil,tp,0,LOCATION_ONFIELD,nil)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,sg,#sg,0,0)
end
function s.desop(e,tp,eg,ep,ev,re,r,rp)
	local sg=Duel.GetMatchingGroup(nil,tp,0,LOCATION_ONFIELD,nil)
	Duel.Destroy(sg,REASON_EFFECT)
end
function s.tgtg(e,tp,eg,ep,ev,re,r,rp,chk)
	local ct=Duel.GetMatchingGroupCount(aux.FaceupFilter(Card.IsRace,RACE_DRAGON),tp,LOCATION_MZONE,0,nil)
	if chk==0 then return ct>0 and Duel.IsPlayerCanDiscardDeckAsCost(tp,ct) end
	Duel.SetOperationInfo(0,CATEGORY_DECKDES,nil,0,tp,ct)
end
function s.tgop(e,tp,eg,ep,ev,re,r,rp)
	local ct=Duel.GetMatchingGroupCount(aux.FaceupFilter(Card.IsRace,RACE_DRAGON),tp,LOCATION_MZONE,0,nil)
	if ct==0 then return end
	Duel.DiscardDeck(tp,ct,REASON_EFFECT)
end