Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Cannot be Normal Summoned/Set. Must be Special Summoned by a card effect. If this card is sent from your Deck to the GY: Special Summon it.
--ライトロード・ビースト ウォルフ
--Wulf, Lightsworn Beast
local s,id=GetID()
function s.initial_effect(c)
	c:EnableUnsummonable()
	--special summon
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_F)
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCode(EVENT_TO_GRAVE)
	e1:SetCondition(s.condtion)
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
	--splimit
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE)
	e2:SetProperty(EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_UNCOPYABLE)
	e2:SetCode(EFFECT_SPSUMMON_CONDITION)
	e2:SetValue(s.splimit)
	c:RegisterEffect(e2)
end
function s.splimit(e,se,sp,st)
	return se:IsHasType(EFFECT_TYPE_ACTIONS)
end
function s.condtion(e,tp,eg,ep,ev,re,r,rp)
	return e:GetHandler():GetPreviousLocation()==LOCATION_DECK
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,e:GetHandler(),1,0,0)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	if e:GetHandler():IsRelateToEffect(e) then
		Duel.SpecialSummon(e:GetHandler(),0,tp,tp,false,false,POS_FACEUP)
	end
end