--Duelahan's Drowsy Glen
local cid,id=GetID()
function cid.initial_effect(c)
	--activate
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	c:RegisterEffect(e1)
	--def up
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetCode(EFFECT_UPDATE_DEFENSE)
	e2:SetRange(LOCATION_FZONE)
	e2:SetTargetRange(LOCATION_MZONE,0)
	e2:SetTarget(cid.deftg)
	e2:SetValue(1000)
	c:RegisterEffect(e2)
	--indes
	local e3=Effect.CreateEffect(c)
	e3:SetType(EFFECT_TYPE_FIELD)
	e3:SetCode(EFFECT_INDESTRUCTABLE_COUNT)
	e3:SetRange(LOCATION_FZONE)
	e3:SetTargetRange(LOCATION_MZONE,0)
	e3:SetTarget(cid.target)
	e3:SetValue(cid.indct)
	c:RegisterEffect(e3)
	--avoid battle damage
	local e4=Effect.CreateEffect(c)
	e4:SetType(EFFECT_TYPE_FIELD)
	e4:SetCode(EFFECT_AVOID_BATTLE_DAMAGE)
	e4:SetRange(LOCATION_FZONE)
	e4:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e4:SetTargetRange(1,0)
	e4:SetValue(1)
	e4:SetCondition(cid.damcon)
	c:RegisterEffect(e4)
	--special summon
	local e5=Effect.CreateEffect(c)
	e5:SetDescription(aux.Stringid(id,0))
	e5:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e5:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e5:SetProperty(EFFECT_FLAG_DAMAGE_STEP)
	e5:SetCode(EVENT_TO_GRAVE)
	e5:SetCountLimit(1,id)
	e5:SetRange(LOCATION_FZONE)
	e5:SetCondition(cid.spcon)
	e5:SetTarget(cid.sptg)
	e5:SetOperation(cid.spop)
	c:RegisterEffect(e5)
end
function cid.deftg(e,c)
	return c:IsSetCard(0x684) and c:GetSequence()<5
end
function cid.cfilter1(c)
	return c:IsFaceup() and c:IsSetCard(0x684) and c:IsLinkState()
end
function cid.damcon(e)
	return Duel.IsExistingMatchingCard(cid.cfilter1,e:GetHandlerPlayer(),LOCATION_MZONE,0,1,nil)
end
function cid.target(e,c)
	return c:IsSetCard(0x684) and c:IsLinkState()
end
function cid.indct(e,re,r,rp)
	if bit.band(r,REASON_BATTLE)~=0 then
		return 1
	else return 0 end
end
function cid.cfilter(c,e,tp)
	return bit.band(c:GetPreviousTypeOnField(),TYPE_LINK)~=0
		and c:IsPreviousSetCard(0x684) and c:GetCode()
		and c:IsPreviousLocation(LOCATION_MZONE) and c:GetPreviousControler()==tp
		and Duel.IsExistingMatchingCard(cid.spfilter,tp,LOCATION_EXTRA,0,1,nil,e,tp,c:GetCode())
end
function cid.spcon(e,tp,eg,ep,ev,re,r,rp)
	return eg:IsExists(cid.cfilter,1,nil,e,tp) and not eg:IsContains(e:GetHandler())
end
function cid.spfilter(c,e,tp,code)
	return c:IsSetCard(0x684) and c:IsLink(1) and not c:IsCode(code)
		and c:IsCanBeSpecialSummoned(e,SUMMON_TYPE_LINK,tp,false,false)
		and Duel.GetLocationCountFromEx(tp,tp,ec,c,0x60)>0
end
function cid.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then
		local g=eg:Filter(cid.cfilter,nil,e,tp)
		local code=g:GetFirst():GetCode()
		e:SetLabel(code)
		return Duel.IsExistingMatchingCard(cid.spfilter,tp,LOCATION_EXTRA,0,1,nil,e,tp,code)
	end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_EXTRA)
end
function cid.spop(e,tp,eg,ep,ev,re,r,rp)
	if not e:GetHandler():IsRelateToEffect(e) then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g=Duel.SelectMatchingCard(tp,cid.spfilter,tp,LOCATION_EXTRA,0,1,1,nil,e,tp,e:GetLabel())
	local tc=g:GetFirst()
	if tc and Duel.SpecialSummon(tc,SUMMON_TYPE_LINK,tp,tp,false,false,POS_FACEUP,0x60)>0 then
		tc:CompleteProcedure()
	end
end