Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Target cards in your opponent's GY, up to the number of "Valkyrie" monsters you control; banish them. If this Set card in its owner's control has left the field because of an opponent's effect, and is now in the GY or banished: You can draw cards equal to the number of "Valkyrie" monsters you control +1.
--フライアのリンゴ
--Apple of Enlightenment
--Scripted by Eerie Code
local s,id=GetID()
function s.initial_effect(c)
	--activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_REMOVE)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
	--special summon
	local e2=Effect.CreateEffect(c)
	e2:SetCategory(CATEGORY_DRAW)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e2:SetCode(EVENT_TO_GRAVE)
	e2:SetProperty(EFFECT_FLAG_DELAY+EFFECT_FLAG_PLAYER_TARGET)
	e2:SetCondition(s.drcon)
	e2:SetTarget(s.drtg)
	e2:SetOperation(s.drop)
	c:RegisterEffect(e2)
	local e3=e2:Clone()
	e3:SetCode(EVENT_REMOVE)
	c:RegisterEffect(e3)
end
s.listed_series={SET_VALKYRIE}
function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsAbleToRemove() and chkc:IsLocation(LOCATION_GRAVE) and chkc:IsControler(1-tp) end
	if chk==0 then return Duel.IsExistingMatchingCard(aux.FaceupFilter(Card.IsSetCard,SET_VALKYRIE),tp,LOCATION_MZONE,0,1,nil)
		and Duel.IsExistingTarget(Card.IsAbleToRemove,tp,0,LOCATION_GRAVE,1,nil) end
	local ct=Duel.GetMatchingGroupCount(aux.FaceupFilter(Card.IsSetCard,SET_VALKYRIE),tp,LOCATION_MZONE,0,nil)
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_REMOVE)
	local g=Duel.SelectTarget(tp,Card.IsAbleToRemove,tp,0,LOCATION_GRAVE,1,ct,nil)
	Duel.SetOperationInfo(0,CATEGORY_REMOVE,g,#g,0,0)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetTargetCards(e)
	if #g>0 then
		Duel.Remove(g,POS_FACEUP,REASON_EFFECT)
	end
end
function s.drcon(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	return c:IsReason(REASON_EFFECT) and rp~=tp and c:IsPreviousControler(tp)
		and c:IsPreviousLocation(LOCATION_ONFIELD) and c:IsPreviousPosition(POS_FACEDOWN)
end
function s.drtg(e,tp,eg,ep,ev,re,r,rp,chk)
	local ct=Duel.GetMatchingGroupCount(aux.FaceupFilter(Card.IsSetCard,SET_VALKYRIE),tp,LOCATION_MZONE,0,nil)
	if chk==0 then return Duel.IsPlayerCanDraw(tp,ct+1) end
	Duel.SetTargetPlayer(tp)
	Duel.SetOperationInfo(0,CATEGORY_DRAW,nil,0,tp,ct+1)
end
function s.drop(e,tp,eg,ep,ev,re,r,rp)
	local p=Duel.GetChainInfo(0,CHAININFO_TARGET_PLAYER)
	local ct=Duel.GetMatchingGroupCount(aux.FaceupFilter(Card.IsSetCard,SET_VALKYRIE),tp,LOCATION_MZONE,0,nil)
	Duel.Draw(p,ct+1,REASON_EFFECT)
end