Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Pay half your LP; Special Summon up to 2 "Darklord" monsters from your Graveyard in Defense Position, with the same Level as 1 face-up monster your opponent controls.
--堕天使降臨
--Darklord Descent
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetCost(s.cost)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
s.listed_series={SET_DARKLORD}
function s.cost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.PayLPCost(tp,math.floor(Duel.GetLP(tp)/2))
end
function s.cfilter(c,e,tp)
	return c:IsFaceup() and c:HasLevel()
		and Duel.IsExistingMatchingCard(s.spfilter,tp,LOCATION_GRAVE,0,1,nil,e,tp,c:GetLevel())
end
function s.spfilter(c,e,tp,lv)
	return c:IsSetCard(SET_DARKLORD) and c:GetLevel()==lv and c:IsCanBeSpecialSummoned(e,0,tp,false,false,POS_FACEUP_DEFENSE)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsExistingMatchingCard(s.cfilter,tp,0,LOCATION_MZONE,1,nil,e,tp) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_GRAVE)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local ft=math.min(Duel.GetLocationCount(tp,LOCATION_MZONE),2)
	if ft<=0 then return end
	if Duel.IsPlayerAffectedByEffect(tp,CARD_BLUEEYES_SPIRIT) then ft=1 end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_OPPO)
	local g=Duel.SelectMatchingCard(tp,s.cfilter,tp,0,LOCATION_MZONE,1,1,nil,e,tp)
	if #g>0 then
		Duel.HintSelection(g)
		local lv=g:GetFirst():GetLevel()
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
		local sg=Duel.SelectMatchingCard(tp,s.spfilter,tp,LOCATION_GRAVE,0,1,ft,nil,e,tp,lv)
		Duel.SpecialSummon(sg,0,tp,tp,false,false,POS_FACEUP_DEFENSE)
	end
end