Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Select 2 cards from the Graveyard(s), and shuffle them into their owner's Deck(s). After activation, remove this card from play instead of sending it to the Graveyard. You can only activate 1 "Pot of Benevolence" per turn.
--無欲な壺
--Pot of Benevolence
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_TODECK)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetCountLimit(1,id,EFFECT_COUNT_CODE_OATH)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return false end
	if chk==0 then return Duel.IsExistingTarget(Card.IsAbleToDeck,tp,LOCATION_GRAVE,LOCATION_GRAVE,2,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TODECK)
	local g=Duel.SelectTarget(tp,Card.IsAbleToDeck,tp,LOCATION_GRAVE,LOCATION_GRAVE,2,2,nil)
	Duel.SetOperationInfo(0,CATEGORY_TODECK,g,2,0,0)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetChainInfo(0,CHAININFO_TARGET_CARDS)
	local sg=g:Filter(Card.IsRelateToEffect,nil,e)
	Duel.SendtoDeck(sg,nil,SEQ_DECKSHUFFLE,REASON_EFFECT)
	if e:GetHandler():IsRelateToEffect(e) and e:IsHasType(EFFECT_TYPE_ACTIVATE) then
		Duel.Remove(e:GetHandler(),POS_FACEUP,REASON_EFFECT)
	end
end