--生贄の祭壇
function c21070956.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_RECOVER)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetCost(c21070956.cost)
	e1:SetTarget(c21070956.target)
	e1:SetOperation(c21070956.activate)
	c:RegisterEffect(e1)
end
function c21070956.cost(e,tp,eg,ep,ev,re,r,rp,chk)
	e:SetLabel(1)
	if chk==0 then return Duel.IsExistingMatchingCard(Card.IsAbleToGraveAsCost,tp,LOCATION_MZONE,0,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TOGRAVE)
	local g=Duel.SelectMatchingCard(tp,Card.IsAbleToGraveAsCost,tp,LOCATION_MZONE,0,1,1,nil);
	local atk=g:GetFirst():GetTextAttack()
	if atk<0 then atk=0 end
	e:SetLabel(atk)
	Duel.SendtoGrave(g,REASON_COST)
end
function c21070956.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then
		local res=e:GetLabel()~=0
		e:SetLabel(0)
		return res
	end
	Duel.SetTargetPlayer(tp)
	Duel.SetTargetParam(e:GetLabel())
	Duel.SetOperationInfo(0,CATEGORY_RECOVER,nil,0,tp,e:GetLabel())
	e:SetLabel(0)
end
function c21070956.activate(e,tp,eg,ep,ev,re,r,rp)
	local p,d=Duel.GetChainInfo(0,CHAININFO_TARGET_PLAYER,CHAININFO_TARGET_PARAM)
	Duel.Recover(p,d,REASON_EFFECT)
end
