--厨房の神 ディアン・ケト
--Dian Keto the Cooking Master
local s,id=GetID()
function s.initial_effect(c)
	--Send the top 3 cards of your Deck to the GY
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_DECKDES+CATEGORY_RECOVER)
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCountLimit(1)
	e1:SetCost(s.cost)
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
end
function s.cost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(Card.IsAbleToGraveAsCost,tp,LOCATION_HAND,0,1,nil) end
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsPlayerCanDiscardDeck(tp,3) end
	Duel.SetOperationInfo(0,CATEGORY_DECKDES,nil,0,tp,3)
end
function s.cfilter(c)
	return c:IsLocation(LOCATION_GRAVE) and c:IsRace(RACE_AQUA) and c:IsMonster()
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	--Requirement
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TOGRAVE)
	local g=Duel.SelectMatchingCard(tp,Card.IsAbleToGraveAsCost,tp,LOCATION_HAND,0,1,1,nil)
	if Duel.SendtoGrave(g,REASON_COST)>0 then
		--Effect
		if Duel.DiscardDeck(tp,3,REASON_EFFECT)~=3 or Duel.GetLP(tp)>2000 then return end
		local ct=Duel.GetOperatedGroup():FilterCount(s.cfilter,nil)
		if ct>0 and Duel.SelectYesNo(tp,aux.Stringid(id,0)) then
			Duel.BreakEffect()
			Duel.Recover(tp,ct*1000,REASON_EFFECT)
		end
	end
end