--オッドアイズ・グラビティ・ドラゴン
--Odd-Eyes Gravity Dragon
local s,id=GetID()
function s.initial_effect(c)
	c:EnableReviveLimit()
	--tohand
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_TOHAND)
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e1:SetCode(EVENT_SPSUMMON_SUCCESS)
	e1:SetCountLimit(1,id)
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
	--activate cost
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetCode(EFFECT_ACTIVATE_COST)
	e2:SetRange(LOCATION_MZONE)
	e2:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e2:SetTargetRange(0,1)
	e2:SetCost(s.costchk)
	e2:SetOperation(s.costop)
	c:RegisterEffect(e2)
	--accumulate
	local e3=Effect.CreateEffect(c)
	e3:SetType(EFFECT_TYPE_FIELD)
	e3:SetCode(id)
	e3:SetRange(LOCATION_MZONE)
	e3:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e3:SetTargetRange(0,1)
	c:RegisterEffect(e3)
end
s.listed_names={16494704}
function s.filter(c)
	return c:IsSpellTrap() and c:IsAbleToHand()
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.filter,tp,0,LOCATION_ONFIELD,1,nil) end
	local sg=Duel.GetMatchingGroup(s.filter,tp,0,LOCATION_ONFIELD,nil)
	Duel.SetOperationInfo(0,CATEGORY_TOHAND,sg,#sg,0,0)
	Duel.SetChainLimit(s.chlimit)
end
function s.chlimit(e,ep,tp)
	return tp==ep
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	local sg=Duel.GetMatchingGroup(s.filter,tp,0,LOCATION_ONFIELD,nil)
	Duel.SendtoHand(sg,nil,REASON_EFFECT)
end
function s.costchk(e,te_or_c,tp)
	local ct=#{Duel.GetPlayerEffect(tp,id)}
	return Duel.CheckLPCost(tp,ct*500)
end
function s.costop(e,tp,eg,ep,ev,re,r,rp)
	Duel.PayLPCost(tp,500)
end