Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
2 "Gravekeeper's" monsters Gains ATK/DEF equal to the combined original Levels of the materials used for its Fusion Summon x 100. While "Necrovalley" is on the field, this card, and any card in your Field Zone, cannot be destroyed by card effects. During your Main Phase: You can activate this effect; during the End Phase of this turn, add 1 "Gravekeeper's" monster or 1 "Necrovalley" card from your Deck to your hand. You can only use this effect of "Gravekeeper's Supernaturalist" once per turn.
--墓守の異能者
--Gravekeeper's Supernaturalist
--Scripted by Eerie Code
local s,id=GetID()
function s.initial_effect(c)
	c:EnableReviveLimit()
	--Fusion procedure
	Fusion.AddProcMixN(c,true,true,aux.FilterBoolFunctionEx(Card.IsSetCard,SET_GRAVEKEEPERS),2)
	--Increase ATK/DEF
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_MATERIAL_CHECK)
	e1:SetValue(s.matcheck)
	c:RegisterEffect(e1)
	--Cannot be destroyed by card effects
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetCode(EFFECT_INDESTRUCTABLE_EFFECT)
	e2:SetRange(LOCATION_MZONE)
	e2:SetTargetRange(LOCATION_ONFIELD,0)
	e2:SetCondition(s.indcon)
	e2:SetTarget(s.indtg)
	e2:SetValue(1)
	c:RegisterEffect(e2)
	--Search 1 "Gravekeeper's" monster or "Necrovalley" card during the End Phase
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,0))
	e3:SetCategory(CATEGORY_TOHAND+CATEGORY_SEARCH)
	e3:SetType(EFFECT_TYPE_IGNITION)
	e3:SetRange(LOCATION_MZONE)
	e3:SetCountLimit(1,id)
	e3:SetTarget(s.regtg)
	e3:SetOperation(s.regop)
	c:RegisterEffect(e3)
end
s.listed_series={SET_GRAVEKEEPERS,SET_NECROVALLEY}
s.listed_names={CARD_NECROVALLEY}
s.material_setcode=SET_GRAVEKEEPERS
function s.matcheck(e,c)
	local lv=c:GetMaterial():GetSum(Card.GetOriginalLevel)
	if lv==0 then return end
	--Increase ATK/DEF
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e1:SetCode(EFFECT_UPDATE_ATTACK)
	e1:SetRange(LOCATION_MZONE)
	e1:SetValue(lv*100)
	e1:SetReset(RESET_EVENT|(RESETS_STANDARD_DISABLE&~RESET_TOFIELD))
	c:RegisterEffect(e1)
	local e2=e1:Clone()
	e2:SetCode(EFFECT_UPDATE_DEFENSE)
	c:RegisterEffect(e2)
end
function s.indcon(e)
	return Duel.IsEnvironment(CARD_NECROVALLEY)
end
function s.indtg(e,c)
	return c==e:GetHandler() or c:IsLocation(LOCATION_FZONE)
end
function s.regtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetPossibleOperationInfo(0,CATEGORY_TOHAND,nil,1,tp,LOCATION_DECK)
end
function s.regop(e,tp,eg,ep,ev,re,r,rp)
	local e1=Effect.CreateEffect(e:GetHandler())
	e1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
	e1:SetCode(EVENT_PHASE+PHASE_END)
	e1:SetCountLimit(1)
	e1:SetCondition(s.thcon)
	e1:SetOperation(s.thop)
	e1:SetReset(RESET_PHASE|PHASE_END)
	Duel.RegisterEffect(e1,tp)
end
function s.thfilter(c)
	return ((c:IsSetCard(SET_GRAVEKEEPERS) and c:IsMonster()) or c:IsSetCard(SET_NECROVALLEY)) and c:IsAbleToHand()
end
function s.thcon(e,tp,eg,ep,ev,re,r,rp)
	return Duel.IsExistingMatchingCard(s.thfilter,tp,LOCATION_DECK,0,1,nil)
end
function s.thop(e,tp,eg,ep,ev,re,r,rp)
	Duel.Hint(HINT_CARD,0,id)
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATOHAND)
	local g=Duel.SelectMatchingCard(tp,s.thfilter,tp,LOCATION_DECK,0,1,1,nil)
	if #g>0 then
		Duel.SendtoHand(g,nil,REASON_EFFECT)
		Duel.ConfirmCards(1-tp,g)
	end
end