--海皇龍神 ポセイドラ・アビス
local s,id,o=GetID()
function s.initial_effect(c)
	--xyz summon
	aux.AddXyzProcedure(c,nil,7,3,s.ovfilter,aux.Stringid(id,0),3,s.xyzop)
	c:EnableReviveLimit()
	--to hand
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_TOHAND)
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCountLimit(1)
	e1:SetCost(s.thcost)
	e1:SetTarget(s.thtg)
	e1:SetOperation(s.thop)
	c:RegisterEffect(e1)
	--spsummon
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e2:SetProperty(EFFECT_FLAG_DELAY)
	e2:SetCode(EVENT_TO_GRAVE)
	e2:SetCondition(s.spcon)
	e2:SetCost(s.spcost)
	e2:SetTarget(s.sptg)
	e2:SetOperation(s.spop)
	c:RegisterEffect(e2)
end
function s.ovfilter(c)
	return c:IsFaceup() and c:IsSetCard(0x77,0x74) and c:IsType(TYPE_XYZ)
end
function s.xyzop(e,tp,chk)
	if chk==0 then return Duel.GetFlagEffect(tp,id)==0 end
	Duel.RegisterFlagEffect(tp,id,RESET_PHASE+PHASE_END,EFFECT_FLAG_OATH,1)
end
function s.cfilter(c,tp)
	return c:IsAttribute(ATTRIBUTE_WATER) and c:IsAbleToGraveAsCost()
end
function s.thcost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return e:GetHandler():CheckRemoveOverlayCard(tp,2,REASON_COST)
		and Duel.IsExistingMatchingCard(s.cfilter,tp,LOCATION_DECK+LOCATION_HAND,0,1,nil,tp) end
	e:GetHandler():RemoveOverlayCard(tp,2,2,REASON_COST)
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TOGRAVE)
	local g=Duel.SelectMatchingCard(tp,s.cfilter,tp,LOCATION_DECK+LOCATION_HAND,0,1,1,nil,tp)
	Duel.SendtoGrave(g,REASON_COST)
end
function s.thtg(e,tp,eg,ep,ev,re,r,rp,chk)
	local g=Duel.GetMatchingGroup(Card.IsAbleToHand,tp,0,LOCATION_ONFIELD,nil)
	if chk==0 then return #g>0 end
	Duel.SetOperationInfo(0,CATEGORY_TOHAND,g,1,0,0)
end
function s.thop(e,tp,eg,ep,ev,re,r,rp)
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_RTOHAND)
	local g=Duel.GetMatchingGroup(Card.IsAbleToHand,tp,0,LOCATION_ONFIELD,nil):Select(tp,1,3,nil)
	if #g>0 then
		Duel.HintSelection(g)
		Duel.SendtoHand(g,nil,REASON_EFFECT)
	end
end
function s.spcon(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	return c:IsPreviousLocation(LOCATION_MZONE) and c:IsSummonType(SUMMON_TYPE_XYZ)
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,nil) end
	Duel.DiscardHand(tp,Card.IsDiscardable,1,1,REASON_COST+REASON_DISCARD)
end
function s.spfilter(c,e,tp)
	return c:IsLevelBelow(3) and c:IsRace(RACE_AQUA+RACE_FISH+RACE_SEASERPENT) and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return not Duel.IsPlayerAffectedByEffect(tp,59822133)
		and Duel.GetLocationCount(tp,LOCATION_MZONE)>2
		and Duel.IsExistingMatchingCard(s.spfilter,tp,LOCATION_HAND+LOCATION_GRAVE,0,3,nil,e,tp) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,3,tp,LOCATION_HAND+LOCATION_GRAVE)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	local ft=math.min((Duel.GetLocationCount(tp,LOCATION_MZONE)),3)
	if ft<3 or Duel.IsPlayerAffectedByEffect(tp,59822133) then return end
	if Duel.GetMatchingGroupCount(aux.NecroValleyFilter(s.spfilter),tp,LOCATION_HAND+LOCATION_GRAVE,0,nil,e,tp)<3 then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g=Duel.SelectMatchingCard(tp,aux.NecroValleyFilter(s.spfilter),tp,LOCATION_HAND+LOCATION_GRAVE,0,3,3,nil,e,tp)
	if g:GetCount()>2 then
		Duel.SpecialSummon(g,0,tp,tp,false,false,POS_FACEUP)
	end
end