Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If this card is destroyed by battle and sent to the GY: Target 2 cards in your opponent's GY; shuffle them into the Deck.
--ケルドウ
--Keldo
local s,id=GetID()
function s.initial_effect(c)
	--todeck
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_TODECK)
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_F)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetCode(EVENT_BATTLE_DESTROYED)
	e1:SetCondition(s.condition)
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
end
function s.condition(e,tp,eg,ep,ev,re,r,rp)
	return e:GetHandler():IsLocation(LOCATION_GRAVE) and e:GetHandler():IsReason(REASON_BATTLE)
end
function s.filter(c,e)
	return c:IsAbleToDeck() and c:IsCanBeEffectTarget(e)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_GRAVE) and chkc:IsControler(1-tp) and s.filter(chkc,e) end
	if chk==0 then return true end
	local g=Duel.GetMatchingGroup(s.filter,tp,0,LOCATION_GRAVE,nil,e)
	if #g>=2 then
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TODECK)
		local sg=g:Select(tp,2,2,nil)
		Duel.SetTargetCard(sg)
		Duel.SetOperationInfo(0,CATEGORY_TODECK,sg,2,0,0)
	end
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetChainInfo(0,CHAININFO_TARGET_CARDS)
	if not g then return end
	local sg=g:Filter(Card.IsRelateToEffect,nil,e)
	Duel.SendtoDeck(sg,nil,SEQ_DECKSHUFFLE,REASON_EFFECT)
end