Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
You can Special Summon this card (from your hand or GY) by removing 6 Spell Counters from a "Magical Citadel of Endymion" you control. If Summoned this way: Target 1 Spell in your GY; add that target to your hand. Once per turn: You can discard 1 Spell, then target 1 card on the field; destroy that target.
--神聖魔導王エンディミオン
--Endymion, the Master Magician
--Updated by Hatter
local s,id=GetID()
function s.initial_effect(c)
	--Special summon procedure
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetCode(EFFECT_SPSUMMON_PROC)
	e1:SetProperty(EFFECT_FLAG_UNCOPYABLE)
	e1:SetRange(LOCATION_HAND|LOCATION_GRAVE)
	e1:SetCondition(s.spcon)
	e1:SetOperation(s.spop)
	e1:SetValue(1)
	c:RegisterEffect(e1)
	--Add 1 Spell to hand
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetCategory(CATEGORY_TOHAND)
	e2:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_F)
	e2:SetRange(LOCATION_MZONE)
	e2:SetCode(EVENT_SPSUMMON_SUCCESS)
	e2:SetCondition(s.condition)
	e2:SetTarget(s.target)
	e2:SetOperation(s.operation)
	c:RegisterEffect(e2)
	--Destroy 1 card on the field
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,1))
	e3:SetCategory(CATEGORY_DESTROY)
	e3:SetType(EFFECT_TYPE_IGNITION)
	e3:SetRange(LOCATION_MZONE)
	e3:SetCountLimit(1)
	e3:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e3:SetCost(s.descost)
	e3:SetTarget(s.destg)
	e3:SetOperation(s.desop)
	c:RegisterEffect(e3)
end
s.counter_list={COUNTER_SPELL}
s.listed_names={39910367}
function s.spfilter(c,tp)
	return c:IsCode(39910367) and c:IsCanRemoveCounter(tp,COUNTER_SPELL,1,REASON_COST)
end
function s.spcon(e,c)
	if c==nil then return true end
	local tp=c:GetControler()
	local g=Duel.GetMatchingGroup(s.spfilter,tp,LOCATION_ONFIELD,0,nil,tp)
	local ct=0
	for i in aux.Next(g) do
		ct=ct+i:GetCounter(COUNTER_SPELL)
	end
	return ct>=6 and Duel.GetLocationCount(tp,LOCATION_MZONE)>0
end
function s.spop(e,tp,eg,ep,ev,re,r,rp,c)
	local g=Duel.GetMatchingGroup(s.spfilter,tp,LOCATION_ONFIELD,0,nil,tp)
	if #g==1 then
		g:GetFirst():RemoveCounter(tp,COUNTER_SPELL,6,REASON_COST)
	else
		local ct=0
		while ct<6 do
			Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SELECT)
			local tc=Duel.SelectMatchingCard(tp,s.spfilter,tp,LOCATION_ONFIELD,0,1,1,nil,tp):GetFirst()
			tc:RemoveCounter(tp,COUNTER_SPELL,1,REASON_COST)
			ct=ct+1
		end
	end
end
function s.condition(e,tp,eg,ep,ev,re,r,rp)
	return e:GetHandler():GetSummonType()==SUMMON_TYPE_SPECIAL+1
end
function s.filter(c)
	return c:IsSpell() and c:IsAbleToHand()
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_GRAVE) and chkc:IsControler(tp) and s.filter(chkc) end
	if chk==0 then return true end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATOHAND)
	local g=Duel.SelectTarget(tp,s.filter,tp,LOCATION_GRAVE,0,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_TOHAND,g,#g,0,0)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc and tc:IsRelateToEffect(e) then
		Duel.SendtoHand(tc,nil,REASON_EFFECT)
		Duel.ShuffleHand(tp)
	end
end
function s.cfilter(c)
	return c:IsSpell() and c:IsDiscardable()
end
function s.descost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.cfilter,tp,LOCATION_HAND,0,1,e:GetHandler()) end
	Duel.DiscardHand(tp,s.cfilter,1,1,REASON_COST|REASON_DISCARD)
end
function s.destg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsOnField() end
	if chk==0 then return Duel.IsExistingTarget(aux.TRUE,tp,LOCATION_ONFIELD,LOCATION_ONFIELD,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_DESTROY)
	local g=Duel.SelectTarget(tp,aux.TRUE,tp,LOCATION_ONFIELD,LOCATION_ONFIELD,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,g,1,0,0)
end
function s.desop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) then
		Duel.Destroy(tc,REASON_EFFECT)
	end
end