--コアキメイル·サンドマン
function c49680980.initial_effect(c)
	--cost
	e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
	e1:SetProperty(EFFECT_FLAG_UNCOPYABLE+EFFECT_FLAG_CANNOT_DISABLE)
	e1:SetCode(EVENT_PHASE+PHASE_END)
	e1:SetCountLimit(1)
	e1:SetRange(LOCATION_MZONE)
	e1:SetOperation(c49680980.ccost)
	c:RegisterEffect(e1)
	--Negate
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(49680980,3))
	e2:SetCategory(CATEGORY_NEGATE+CATEGORY_DESTROY)
	e2:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_QUICK_O)
	e2:SetProperty(EFFECT_FLAG_DAMAGE_STEP+EFFECT_FLAG_DAMAGE_CAL)
	e2:SetCode(EVENT_CHAINING)
	e2:SetRange(LOCATION_MZONE)
	e2:SetCondition(c49680980.condition)
	e2:SetCost(c49680980.cost)
	e2:SetTarget(c49680980.target)
	e2:SetOperation(c49680980.operation)
	c:RegisterEffect(e2)
end
function c49680980.cfilter1(c)
	return c:IsCode(36623431) and c:IsAbleToGraveAsCost()
end
function c49680980.cfilter2(c)
	return c:IsType(TYPE_MONSTER) and c:IsRace(RACE_ROCK) and not c:IsPublic()
end
function c49680980.ccost(e,tp)
	if tp~=Duel.GetTurnPlayer() then return end
	local g1=Duel.GetMatchingGroup(c49680980.cfilter1,tp,LOCATION_HAND,0,nil)
	local g2=Duel.GetMatchingGroup(c49680980.cfilter2,tp,LOCATION_HAND,0,nil)
	local select=2
	Duel.Hint(HINT_SELECTMSG,tp,0)
	if g1:GetCount()>0 and g2:GetCount()>0 then
		select=Duel.SelectOption(tp,aux.Stringid(49680980,0),aux.Stringid(49680980,1),aux.Stringid(49680980,2))
	elseif g1:GetCount()>0 then
		select=Duel.SelectOption(tp,aux.Stringid(49680980,0),aux.Stringid(49680980,2))
		if select==1 then select=2 end
	elseif g2:GetCount()>0 then
		select=Duel.SelectOption(tp,aux.Stringid(49680980,1),aux.Stringid(49680980,2))
		select=select+1
	end
	if select==0 then
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TOGRAVE)
		local g=g1:Select(tp,1,1,nil)
		Duel.SendtoGrave(g,REASON_COST)
	elseif select==1 then
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_CONFIRM)
		local g=g2:Select(tp,1,1,nil)
		Duel.ConfirmCards(1-tp,g)
		Duel.ShuffleHand(tp)
	else
		Duel.Destroy(e:GetHandler(),REASON_RULE)
	end
end
function c49680980.condition(e,tp,eg,ep,ev,re,r,rp)
	return not e:GetHandler():IsStatus(STATUS_BATTLE_DESTROYED) and ep~=tp
		and re:IsHasType(EFFECT_TYPE_ACTIVATE) and re:IsActiveType(TYPE_TRAP) and Duel.IsChainInactivatable(ev)
end
function c49680980.cost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return e:GetHandler():IsReleaseable() end
	Duel.Release(e:GetHandler(),REASON_COST)
end
function c49680980.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetOperationInfo(0,CATEGORY_NEGATE,eg,1,0,0)
	if re:GetHandler():IsDestructable() and re:GetHandler():IsRelateToEffect(re) then
		Duel.SetOperationInfo(0,CATEGORY_DESTROY,eg,1,0,0)
	end
end
function c49680980.operation(e,tp,eg,ep,ev,re,r,rp)
	Duel.NegateActivation(ev)
	if re:GetHandler():IsRelateToEffect(re) then
		Duel.Destroy(eg,REASON_EFFECT)
	end
end
