Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
You can Special Summon this card from your hand by returning 1 face-up "Mist Valley" monster you control to the hand. If you do, this card's ATK becomes 1700.
--ミスト・コンドル
--Mist Condor
local s,id=GetID()
function s.initial_effect(c)
	--special summon procedure
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetCode(EFFECT_SPSUMMON_PROC)
	e1:SetProperty(EFFECT_FLAG_UNCOPYABLE)
	e1:SetRange(LOCATION_HAND)
	e1:SetCondition(s.spcon)
	e1:SetTarget(s.sptg)
	e1:SetOperation(s.spop)
	c:RegisterEffect(e1)
end
s.listed_series={SET_MIST_VALLEY}
function s.spfilter(c,ft)
	return c:IsFaceup() and c:IsSetCard(SET_MIST_VALLEY) and c:IsAbleToHandAsCost() and (ft>0 or c:GetSequence()<5)
end
function s.spcon(e,c)
	if c==nil then return true end
	local tp=e:GetHandlerPlayer()
	local ft=Duel.GetLocationCount(tp,LOCATION_MZONE)
	local rg=Duel.GetMatchingGroup(s.spfilter,tp,LOCATION_MZONE,0,nil,ft)
	return ft>-1 and #rg>0 and aux.SelectUnselectGroup(rg,e,tp,1,1,nil,0)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,c)
	local c=e:GetHandler()
	local g=nil
	local rg=Duel.GetMatchingGroup(s.spfilter,tp,LOCATION_MZONE,0,nil,Duel.GetLocationCount(tp,LOCATION_MZONE))
	local g=aux.SelectUnselectGroup(rg,e,tp,1,1,nil,1,tp,HINTMSG_RTOHAND,nil,nil,true)
	if #g>0 then
		g:KeepAlive()
		e:SetLabelObject(g)
		return true
	end
	return false
end
function s.spop(e,tp,eg,ep,ev,re,r,rp,c)
	local g=e:GetLabelObject()
	if not g then return end
	Duel.SendtoHand(g,nil,REASON_COST)
	local e1=Effect.CreateEffect(e:GetHandler())
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
	e1:SetCode(EFFECT_SET_ATTACK)
	e1:SetValue(1700)
	e1:SetReset(RESET_EVENT|(RESETS_STANDARD_DISABLE&~RESET_TOFIELD))
	e:GetHandler():RegisterEffect(e1)
	g:DeleteGroup()
end