local cm,m=GetID()
cm.name="钻机山魈"
function cm.initial_effect(c)
	--Position
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(m,0))
	e1:SetCategory(CATEGORY_POSITION+CATEGORY_ATKCHANGE)
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCondition(RD.ConditionSummonOrSpecialSummonMainPhase)
	e1:SetTarget(cm.target)
	e1:SetOperation(cm.operation)
	c:RegisterEffect(e1)
end
--Position
function cm.filter(c)
	return c:IsFaceup() and c:IsRace(RACE_MACHINE)
end
function cm.posfilter(c,e,tp)
	return c:IsPosition(POS_FACEDOWN_DEFENSE) and RD.IsCanChangePosition(c,e,tp,REASON_EFFECT)
end
function cm.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(cm.filter,tp,LOCATION_MZONE,0,1,nil)
		and Duel.IsExistingMatchingCard(cm.posfilter,tp,0,LOCATION_MZONE,1,nil,e,tp) end
	local g=Duel.GetMatchingGroup(cm.posfilter,tp,0,LOCATION_MZONE,nil,e,tp)
	Duel.SetOperationInfo(0,CATEGORY_POSITION,g,1,0,0)
end
function cm.operation(e,tp,eg,ep,ev,re,r,rp)
	local ct=Duel.GetMatchingGroupCount(cm.filter,tp,LOCATION_MZONE,0,nil)
	if ct==0 then return end
	local filter=RD.Filter(cm.posfilter,e,tp)
	RD.SelectAndDoAction(HINTMSG_POSCHANGE,filter,tp,0,LOCATION_MZONE,1,ct,nil,function(g)
		if RD.ChangePosition(g,e,tp,REASON_EFFECT,POS_FACEUP_ATTACK)~=0 then
			local og=Duel.GetOperatedGroup()
			og:ForEach(function(tc)
				RD.SetBaseAtkDef(e,tc,0,nil,RESET_EVENT+RESETS_STANDARD+RESET_PHASE+PHASE_END)
			end)
		end
	end)
end