Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Banish all "Laval" monsters from your Graveyard; destroy any number of cards on the field, up to the number of monsters banished for this card's activation.
--炎塵爆発
--Dustflame Blast
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_DESTROY)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetHintTiming(0,TIMINGS_CHECK_MONSTER_E)
	e1:SetCost(s.cost)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
s.listed_series={SET_LAVAL}
s.check=false
function s.cfilter(c)
	return c:IsSetCard(SET_LAVAL) and c:IsAbleToRemoveAsCost() and aux.SpElimFilter(c,true)
end
function s.cost(e,tp,eg,ep,ev,re,r,rp,chk)
	s.check=true
	if chk==0 then return Duel.IsExistingMatchingCard(s.cfilter,tp,LOCATION_MZONE|LOCATION_GRAVE,0,1,nil) end
	local g=Duel.GetMatchingGroup(s.cfilter,tp,LOCATION_MZONE|LOCATION_GRAVE,0,nil)
	Duel.Remove(g,POS_FACEUP,REASON_COST)
	e:SetLabel(#g)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then
		if not s.check then return false end
		s.check=false
		return Duel.IsExistingMatchingCard(aux.TRUE,tp,LOCATION_ONFIELD,LOCATION_ONFIELD,1,e:GetHandler())
	end
	s.check=false
	local g=Duel.GetMatchingGroup(aux.TRUE,tp,LOCATION_ONFIELD,LOCATION_ONFIELD,e:GetHandler())
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,g,1,0,0)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_DESTROY)
	local g=Duel.SelectMatchingCard(tp,aux.TRUE,tp,LOCATION_ONFIELD,LOCATION_ONFIELD,1,e:GetLabel(),e:GetHandler())
	Duel.Destroy(g,REASON_EFFECT)
end