--光と闇の竜
function c47297616.initial_effect(c)
	--cannot special summon
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_UNCOPYABLE)
	e1:SetCode(EFFECT_SPSUMMON_CONDITION)
	e1:SetValue(aux.FALSE)
	c:RegisterEffect(e1)
	--Attribute Dark
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE)
	e2:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e2:SetCode(EFFECT_ADD_ATTRIBUTE)
	e2:SetRange(LOCATION_MZONE)
	e2:SetValue(ATTRIBUTE_DARK)
	c:RegisterEffect(e2)
	--Negate
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(47297616,2))
	e3:SetCategory(CATEGORY_NEGATE)
	e3:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_QUICK_F)
	e3:SetCode(EVENT_CHAINING)
	e3:SetProperty(EFFECT_FLAG_DAMAGE_STEP+EFFECT_FLAG_DAMAGE_CAL)
	e3:SetRange(LOCATION_MZONE)
	e3:SetCondition(c47297616.codisable)
	e3:SetTarget(c47297616.tgdisable)
	e3:SetOperation(c47297616.opdisable)
	c:RegisterEffect(e3)
	--Special summon
	local e4=Effect.CreateEffect(c)
	e4:SetDescription(aux.Stringid(47297616,4))
	e4:SetCategory(CATEGORY_SPECIAL_SUMMON+CATEGORY_DESTROY)
	e4:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_F)
	e4:SetCode(EVENT_TO_GRAVE)
	e4:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e4:SetCondition(c47297616.cdspsum)
	e4:SetTarget(c47297616.tgspsum)
	e4:SetOperation(c47297616.opspsum)
	c:RegisterEffect(e4)
end
function c47297616.codisable(e,tp,eg,ep,ev,re,r,rp)
	return (re:IsHasType(EFFECT_TYPE_ACTIVATE) or re:IsActiveType(TYPE_MONSTER))
		and not e:GetHandler():IsStatus(STATUS_CHAINING) and Duel.IsChainInactivatable(ev)
end
function c47297616.tgdisable(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return c:GetFlagEffect(47297616)==0 end
	if c:IsHasEffect(EFFECT_REVERSE_UPDATE) then
		c:RegisterFlagEffect(47297616,RESET_EVENT+0x1fe0000+RESET_PHASE+PHASE_END,0,1)
	end
	Duel.SetOperationInfo(0,CATEGORY_NEGATE,eg,1,0,0)
end
function c47297616.opdisable(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if not c:IsFaceup() or c:GetDefence()<500 or c:GetAttack()< 500 or not c:IsRelateToEffect(e) or Duel.GetCurrentChain()~=ev+1 then
		return
	end
	Duel.NegateActivation(ev)
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetProperty(EFFECT_FLAG_COPY_INHERIT)
	e1:SetReset(RESET_EVENT+0x1ff0000)
	e1:SetCode(EFFECT_UPDATE_ATTACK)
	e1:SetValue(-500)
	c:RegisterEffect(e1)
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE)
	e2:SetProperty(EFFECT_FLAG_COPY_INHERIT)
	e2:SetReset(RESET_EVENT+0x1ff0000)
	e2:SetCode(EFFECT_UPDATE_DEFENCE)
	e2:SetValue(-500)
	c:RegisterEffect(e2)
end
function c47297616.cdspsum(e)
	return e:GetHandler():IsReason(REASON_DESTROY)
end
function c47297616.tgspsum(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_GRAVE) and chkc:IsControler(tp)
		and chkc:IsCanBeSpecialSummoned(e,0,PLAYER_NONE,false,false,POS_FACEUP,tp) end
	if chk==0 then return true end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g=Duel.SelectTarget(tp,Card.IsCanBeSpecialSummoned,tp,LOCATION_GRAVE,0,1,1,nil,e,0,PLAYER_NONE,false,false,POS_FACEUP,tp)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,g,g:GetCount(),0,0)
	local dg=Duel.GetMatchingGroup(Card.IsDestructable,tp,LOCATION_ONFIELD,0,nil)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,dg,dg:GetCount(),0,0)
end
function c47297616.opspsum(e,tp,eg,ep,ev,re,r,rp)
	local dg=Duel.GetMatchingGroup(nil,tp,LOCATION_ONFIELD,0,nil)
	Duel.Destroy(dg,REASON_EFFECT)
	local tc=Duel.GetFirstTarget()
	if tc and tc:IsRelateToEffect(e) then
		Duel.SpecialSummon(tc,0,tp,tp,false,false,POS_FACEUP)
	end
end
