Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
"Dark Blade" + "Pitch-Dark Dragon" Each time this card inflicts Battle Damage to your opponent, you can select up to 3 Monster Cards from your opponent's Graveyard and remove them from play.
--闇魔界の竜騎士 ダークソード
--Dark Blade the Dragon Knight
local s,id=GetID()
function s.initial_effect(c)
	--fusion material
	c:EnableReviveLimit()
	Fusion.AddProcMix(c,true,true,11321183,47415292)
	--remove
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_REMOVE)
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET+EFFECT_FLAG_DAMAGE_STEP)
	e1:SetCode(EVENT_BATTLE_DAMAGE)
	e1:SetCondition(s.rmcon)
	e1:SetTarget(s.rmtg)
	e1:SetOperation(s.rmop)
	c:RegisterEffect(e1)
end
function s.rmcon(e,tp,eg,ep,ev,re,r,rp)
	return ep~=tp
end
function s.filter(c)
	return c:IsMonster() and c:IsAbleToRemove() and aux.SpElimFilter(c)
end
function s.rmtg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsControler(1-tp) and chkc:IsLocation(LOCATION_MZONE|LOCATION_GRAVE) and s.filter(chkc) end
	if chk==0 then return Duel.IsExistingTarget(s.filter,tp,0,LOCATION_MZONE|LOCATION_GRAVE,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_REMOVE)
	local g=Duel.SelectTarget(tp,s.filter,tp,0,LOCATION_MZONE|LOCATION_GRAVE,1,3,nil)
	Duel.SetOperationInfo(0,CATEGORY_REMOVE,g,#g,0,0)
end
function s.rmop(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetChainInfo(0,CHAININFO_TARGET_CARDS)
	local sg=g:Filter(Card.IsRelateToEffect,nil,e)
	Duel.Remove(sg,POS_FACEUP,REASON_EFFECT)
end