--Dipsea Foend
local s,id,o=GetID()
function s.initial_effect(c)
	--special summon
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON+CATEGORY_GRAVE_SPSUMMON)
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetRange(LOCATION_HAND)
	e1:SetCountLimit(1,id)
	e1:SetCost(s.spcost)
	e1:SetTarget(s.sptg)
	e1:SetOperation(s.spop)
	c:RegisterEffect(e1)
end
function s.spcost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(Card.IsDiscardable,tp,LOCATION_HAND,0,1,e:GetHandler()) end
	Duel.DiscardHand(tp,Card.IsDiscardable,1,1,REASON_COST+REASON_DISCARD,e:GetHandler())
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0 and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
		or Duel.GetLocationCount(1-tp,LOCATION_MZONE)>0 and c:IsCanBeSpecialSummoned(e,0,tp,false,false,POS_FACEUP,1-tp) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATTRIBUTE)
	local att=Duel.AnnounceAttribute(tp,1,ATTRIBUTE_ALL&~ATTRIBUTE_WATER)
	e:SetLabel(att)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,e:GetHandler(),1,0,0)
end
function s.spfilter(c,e,tp,att)
	return c:IsRace(RACE_FIEND) and c:IsLevelBelow(4)
		and c:GetOriginalAttribute()~=att
		and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if not c:IsRelateToEffect(e) then return end
	local b1=Duel.GetLocationCount(tp,LOCATION_MZONE)>0 and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
	local b2=Duel.GetLocationCount(1-tp,LOCATION_MZONE)>0 and c:IsCanBeSpecialSummoned(e,0,tp,false,false,POS_FACEUP,1-tp)
	local op=0
	if b1 and b2 then
		op=Duel.SelectOption(tp,aux.Stringid(id,1),aux.Stringid(id,2))
	elseif b1 then
		op=Duel.SelectOption(tp,aux.Stringid(id,1))
	elseif b2 then
		op=Duel.SelectOption(tp,aux.Stringid(id,2))+1
	else
		Duel.SendtoGrave(c,REASON_RULE)
	end
	local sp=0
	if op==0 then
		sp=Duel.SpecialSummonStep(c,0,tp,tp,false,false,POS_FACEUP)
	else
		sp=Duel.SpecialSummonStep(c,0,tp,1-tp,false,false,POS_FACEUP)
	end
	local att=e:GetLabel()
	if sp~=0 then
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_CHANGE_ATTRIBUTE)
		e1:SetValue(att)
		e1:SetReset(RESET_EVENT+RESETS_STANDARD+RESET_DISABLE+RESET_PHASE+PHASE_END)
		c:RegisterEffect(e1)
	end
	Duel.SpecialSummonComplete()
	if op==1 and Duel.GetMZoneCount(tp,e:GetHandler())>0
		and Duel.IsExistingMatchingCard(aux.NecroValleyFilter(s.spfilter),tp,LOCATION_HAND+LOCATION_GRAVE,0,1,nil,e,tp,att)
		and Duel.SelectYesNo(tp,aux.Stringid(id,3)) then
		Duel.BreakEffect()
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
		local g=Duel.SelectMatchingCard(tp,aux.NecroValleyFilter(s.spfilter),tp,LOCATION_HAND+LOCATION_GRAVE,0,1,1,nil,e,tp,att)
		if g:GetCount()>0 then
			Duel.SpecialSummon(g,0,tp,tp,false,false,POS_FACEUP)
		end
	end
	local e1=Effect.CreateEffect(e:GetHandler())
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetCode(EFFECT_CANNOT_SPECIAL_SUMMON)
	e1:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e1:SetTargetRange(1,0)
	e1:SetTarget(s.splimit)
	e1:SetReset(RESET_PHASE+PHASE_END)
	Duel.RegisterEffect(e1,tp)
end
function s.splimit(e,c)
	return not c:IsRace(RACE_FIEND) and c:IsLocation(LOCATION_EXTRA)
end