Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
2 Level 4 monsters Once per Chain, during either player's turn, if 2 or more monsters with the same name are on the field: You can detach 1 Xyz Material from this card; choose 1 monster among those with the same name, and destroy all other monsters with that name. While this card remains face-up on the field, your opponent cannot Summon monsters with the same name as any of the monster(s) chosen for this card's effect. If this card is sent to the Graveyard: You can send 2 "Heraldic Beast" monsters from your Deck to the Graveyard.
--No.18 紋章祖プレイン・コート
--Number 18: Heraldry Patriarch
local s,id=GetID()
function s.initial_effect(c)
	--Xyz Summon procedure: 2 Level 4 monsters
	Xyz.AddProcedure(c,nil,4,2)
	c:EnableReviveLimit()
	--Destroy monsters on the field
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_DESTROY)
	e1:SetType(EFFECT_TYPE_QUICK_O)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetHintTiming(0,TIMINGS_CHECK_MONSTER)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCountLimit(1,0,EFFECT_COUNT_CODE_CHAIN)
	e1:SetCost(Cost.DetachFromSelf(1,1,nil))
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
	--Send 2 "Heraldic Beast" monsters from your Deck to the Graveyard.
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_TOGRAVE)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e2:SetProperty(EFFECT_FLAG_DELAY+EFFECT_FLAG_DAMAGE_STEP)
	e2:SetCode(EVENT_TO_GRAVE)
	e2:SetTarget(s.tgtg)
	e2:SetOperation(s.tgop)
	c:RegisterEffect(e2)
end
s.listed_series={SET_HERALDIC_BEAST}
s.xyz_number=18
function s.cfilter(c)
	return c:IsFaceup() and Duel.IsExistingMatchingCard(aux.FaceupFilter(Card.IsCode,c:GetCode()),0,LOCATION_MZONE,LOCATION_MZONE,1,c)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.cfilter,tp,LOCATION_MZONE,LOCATION_MZONE,1,nil) end
	local g=Duel.GetMatchingGroup(s.cfilter,tp,LOCATION_MZONE,LOCATION_MZONE,nil)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,g,1,0,0)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	Duel.Hint(HINT_SELECTMSG,tp,aux.Stringid(id,2))
	local tc=Duel.SelectMatchingCard(tp,s.cfilter,tp,LOCATION_MZONE,LOCATION_MZONE,1,1,nil):GetFirst()
	if tc then
		local dg=Duel.GetMatchingGroup(aux.FaceupFilter(Card.IsCode,tc:GetCode()),tp,LOCATION_MZONE,LOCATION_MZONE,tc)
		Duel.Destroy(dg,REASON_EFFECT)
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_FIELD)
		e1:SetRange(LOCATION_MZONE)
		e1:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
		e1:SetCode(EFFECT_CANNOT_SPECIAL_SUMMON)
		e1:SetTargetRange(0,1)
		e1:SetLabel(tc:GetCode())
		e1:SetTarget(function(e,c) return c:IsCode(e:GetLabel()) end)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD)
		c:RegisterEffect(e1)
		local e2=e1:Clone()
		e2:SetCode(EFFECT_CANNOT_SUMMON)
		c:RegisterEffect(e2)
		local e3=e1:Clone()
		e3:SetCode(EFFECT_CANNOT_FLIP_SUMMON)
		c:RegisterEffect(e3)
	end
end
function s.tgfilter(c)
	return c:IsSetCard(SET_HERALDIC_BEAST) and c:IsMonster() and c:IsAbleToGrave()
end
function s.tgtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.tgfilter,tp,LOCATION_DECK,0,2,nil) end
	Duel.SetOperationInfo(0,CATEGORY_TOGRAVE,nil,2,tp,LOCATION_DECK)
end
function s.tgop(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetMatchingGroup(s.tgfilter,tp,LOCATION_DECK,0,nil)
	if #g>1 then
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TOGRAVE)
		local sg=g:Select(tp,2,2,nil)
		Duel.SendtoGrave(sg,REASON_EFFECT)
	end
end