--しっぺ返し
--Retort
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_NEGATE+CATEGORY_DESTROY+CATEGORY_TOHAND)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_CHAINING)
	e1:SetCondition(s.condition)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
function s.condition(e,tp,eg,ep,ev,re,r,rp)
	return rp~=tp and re:IsHasType(EFFECT_TYPE_ACTIVATE) and Duel.IsChainNegatable(ev)
		and Duel.IsExistingMatchingCard(Card.IsCode,tp,LOCATION_GRAVE,0,1,nil,re:GetHandler():GetCode())
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetOperationInfo(0,CATEGORY_NEGATE,eg,1,0,0)
	if re:GetHandler():IsRelateToEffect(re) then
		Duel.SetOperationInfo(0,CATEGORY_DESTROY,eg,1,0,0)
	end
	Duel.SetPossibleOperationInfo(0,CATEGORY_TOHAND,nil,1,tp,LOCATION_GRAVE)
end
function s.filter(c,code)
	return c:IsCode(code) and c:IsAbleToHand()
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local code=re:GetHandler():GetCode()
	if Duel.NegateActivation(ev) and re:GetHandler():IsRelateToEffect(re) then
		Duel.Destroy(eg,REASON_EFFECT)
	end
	local g=Duel.GetMatchingGroup(aux.NecroValleyFilter(s.filter),tp,LOCATION_GRAVE,0,nil,code)
	if #g>0 and Duel.SelectYesNo(tp,aux.Stringid(id,0)) then
		Duel.BreakEffect()
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATOHAND)
		local sg=g:Select(tp,1,1,nil)
		Duel.SendtoHand(sg,nil,REASON_EFFECT)
		Duel.ConfirmCards(1-tp,sg)
	end
end