Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If you have 3 or more "Memento" monsters with different names in your GY, you can Special Summon this card (from your hand). You can only Special Summon "Mementotlan-Horned Dragon" once per turn this way. If this card on the field is destroyed by card effect: You can target 3 face-up cards on the field, including a "Memento" card you control; destroy them. You can only use this effect of "Mementotlan-Horned Dragon" once per turn.
--メメント・ホーン・ドラゴン
--Mementotlan-Horned Dragon
--Scripted by Satellaa
local s,id=GetID()
function s.initial_effect(c)
	--Special Summon itself from the hand
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetProperty(EFFECT_FLAG_UNCOPYABLE)
	e1:SetCode(EFFECT_SPSUMMON_PROC)
	e1:SetRange(LOCATION_HAND)
	e1:SetCountLimit(1,id,EFFECT_COUNT_CODE_OATH)
	e1:SetCondition(s.spcon)
	c:RegisterEffect(e1)
	--Destroy 3 face-up cards on the field
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_DESTROY)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e2:SetProperty(EFFECT_FLAG_DELAY+EFFECT_FLAG_CARD_TARGET)
	e2:SetCode(EVENT_DESTROYED)
	e2:SetCountLimit(1,{id,1})
	e2:SetCondition(s.descon)
	e2:SetTarget(s.destg)
	e2:SetOperation(s.desop)
	c:RegisterEffect(e2)
end
s.listed_series={SET_MEMENTO}
function s.spcon(e,c)
	if c==nil then return true end
	local tp=e:GetHandlerPlayer()
	local g=Duel.GetMatchingGroup(aux.AND(Card.IsMonster,Card.IsSetCard),tp,LOCATION_GRAVE,0,nil,SET_MEMENTO)
	return Duel.GetLocationCount(tp,LOCATION_MZONE)>0 and #g>=3 and g:GetClassCount(Card.GetCode)>=3
end
function s.descon(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	return c:IsReason(REASON_EFFECT) and c:IsPreviousLocation(LOCATION_ONFIELD)
end
function s.mementofilter(c,tp)
	return c:IsSetCard(SET_MEMENTO) and c:IsControler(tp)
end
function s.rescon(sg,e,tp,mg)
	return sg:IsExists(s.mementofilter,1,nil,tp)
end
function s.destg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return false end
	local g=Duel.GetMatchingGroup(aux.FaceupFilter(Card.IsCanBeEffectTarget,e),tp,LOCATION_ONFIELD,LOCATION_ONFIELD,nil)
	if chk==0 then return aux.SelectUnselectGroup(g,e,tp,3,3,s.rescon,0) end
	local sg=aux.SelectUnselectGroup(g,e,tp,3,3,s.rescon,1,tp,HINTMSG_DESTROY)
	Duel.SetTargetCard(sg)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,sg,3,tp,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