name: Poseidra
card_text: 3 Level 7 monsters
  Once per turn, you can also Xyz Summon "Poseidra Abyss, the Atlantean Dragon Lord" by using 1 "Atlantean" or "Mermail" Xyz Monster you control. (Transfer its materials to this card.) Once per turn: You can detach 2 materials from this card, then send 1 WATER monster from your hand or Deck to the GY; return up to 3 cards your opponent controls to the hand. If this Xyz Summoned card is sent to the GY: You can discard 1 card to the GY; Special Summon 3 Level 3 or lower Fish, Sea Serpent, and/or Aqua monsters from your hand and/or GY.
external_ids: local CARD_ID_0 = 59822133 --Blue-Eyes Spirit Dragon
  local SETCARD_ID_0 = 0x77 --Atlantean
  
lua: local CARD_ID_0 = 59822133 --Blue-Eyes Spirit Dragon
  local SETCARD_ID_0 = 0x77 --Atlantean
  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, 1))
  	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, 2))
  	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(SETCARD_ID_0, 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.spcfilter(c)
  	return c:IsAbleToGraveAsCost() and c:IsDiscardable()
  end
  function s.spcost(e, tp, eg, ep, ev, re, r, rp, chk)
  	if chk == 0 then
  		return Duel.IsExistingMatchingCard(s.spcfilter, tp, LOCATION_HAND, 0, 1, nil)
  	end
  	Duel.DiscardHand(tp, s.spcfilter, 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, CARD_ID_0)
  			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)
  	if Duel.GetLocationCount(tp, LOCATION_MZONE) < 3 or Duel.IsPlayerAffectedByEffect(tp, CARD_ID_0) 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
  
  
source_text: Poseidra
  3 Level 7 monsters
  Once per turn, you can also Xyz Summon "Poseidra Abyss, the Atlantean Dragon Lord" by using 1 "Atlantean" or "Mermail" Xyz Monster you control. (Transfer its materials to this card.) Once per turn: You can detach 2 materials from this card, then send 1 WATER monster from your hand or Deck to the GY; return up to 3 cards your opponent controls to the hand. If this Xyz Summoned card is sent to the GY: You can discard 1 card to the GY; Special Summon 3 Level 3 or lower Fish, Sea Serpent, and/or Aqua monsters from your hand and/or GY.
target_text: -- Poseidra
  local CARD_ID_0 = 59822133 --Blue-Eyes Spirit Dragon
  local SETCARD_ID_0 = 0x77 --Atlantean
  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, 1))
  	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, 2))
  	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(SETCARD_ID_0, 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.spcfilter(c)
  	return c:IsAbleToGraveAsCost() and c:IsDiscardable()
  end
  function s.spcost(e, tp, eg, ep, ev, re, r, rp, chk)
  	if chk == 0 then
  		return Duel.IsExistingMatchingCard(s.spcfilter, tp, LOCATION_HAND, 0, 1, nil)
  	end
  	Duel.DiscardHand(tp, s.spcfilter, 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, CARD_ID_0)
  			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)
  	if Duel.GetLocationCount(tp, LOCATION_MZONE) < 3 or Duel.IsPlayerAffectedByEffect(tp, CARD_ID_0) 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
  
  