local cm,m=GetID()
local list={120145052,120145050}
cm.name="头锤抹香鲸"
function cm.initial_effect(c)
	RD.AddCodeList(c,list)
	--Atk Down
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(m,0))
	e1:SetCategory(CATEGORY_ATKCHANGE+CATEGORY_DAMAGE)
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCost(cm.cost)
	e1:SetTarget(cm.target)
	e1:SetOperation(cm.operation)
	c:RegisterEffect(e1)
end
--Atk Down
function cm.exfilter(c)
	return c:IsFaceup() and c:IsCode(list[1],list[2])
end
cm.cost=RD.CostSendDeckTopToGrave(1)
function cm.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(Card.IsFaceup,tp,0,LOCATION_MZONE,1,nil) end
end
function cm.operation(e,tp,eg,ep,ev,re,r,rp)
	RD.SelectAndDoAction(aux.Stringid(m,1),Card.IsFaceup,tp,0,LOCATION_MZONE,1,1,nil,function(g)
		RD.AttachAtkDef(e,g:GetFirst(),-500,0,RESET_EVENT+RESETS_STANDARD+RESET_PHASE+PHASE_END)
		if Duel.IsExistingMatchingCard(cm.exfilter,tp,LOCATION_ONFIELD,0,1,nil) then
			Duel.Damage(1-tp,500,REASON_EFFECT)
		end
	end)
end