--創獄神ネルヴァ
local s,id,o=GetID()
function s.initial_effect(c)
	c:SetSPSummonOnce(id)
	aux.AddFusionProcFunRep(c,s.ffilter,3,true)
	c:EnableReviveLimit()
	--special summon condition
	local e0=Effect.CreateEffect(c)
	e0:SetType(EFFECT_TYPE_SINGLE)
	e0:SetProperty(EFFECT_FLAG_SINGLE_RANGE+EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_UNCOPYABLE)
	e0:SetCode(EFFECT_SPSUMMON_CONDITION)
	e0:SetRange(LOCATION_EXTRA)
	e0:SetValue(aux.fuslimit)
	c:RegisterEffect(e0)
	--spsummon
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_UNCOPYABLE+EFFECT_FLAG_SPSUM_PARAM)
	e1:SetCode(EFFECT_SPSUMMON_PROC)
	e1:SetTargetRange(POS_FACEUP_DEFENSE,0)
	e1:SetRange(LOCATION_EXTRA)
	e1:SetCondition(s.hspcon)
	e1:SetTarget(s.hsptg)
	e1:SetOperation(s.hspop)
	c:RegisterEffect(e1)
	--indestructable
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE)
	e2:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e2:SetCode(EFFECT_INDESTRUCTABLE_EFFECT)
	e2:SetRange(LOCATION_MZONE)
	e2:SetCondition(s.indcon)
	e2:SetValue(1)
	c:RegisterEffect(e2)
	--change effect
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,0))
	e3:SetType(EFFECT_TYPE_QUICK_O)
	e3:SetCode(EVENT_CHAINING)
	e3:SetRange(LOCATION_MZONE)
	e3:SetCountLimit(1)
	e3:SetCondition(s.chcon)
	e3:SetTarget(s.chtg)
	e3:SetOperation(s.chop)
	c:RegisterEffect(e3)
end
function s.ffilter(c)
	return c:IsFusionSetCard(0x2cd)
end
function s.hspfilter(c,tp,sc)
	return c:IsControler(tp) and c:IsReleasable(REASON_SPSUMMON)
		and c:IsCanBeFusionMaterial(sc,SUMMON_TYPE_SPECIAL)
end
function s.hspchk(g,tp,sc)
	return Duel.GetLocationCountFromEx(tp,tp,g,sc)>0
		and g:GetClassCount(Card.GetRace)==#g
end
function s.hspcon(e,c)
	if c==nil then return true end
	local tp=c:GetControler()
	local rg=Duel.GetMatchingGroup(s.hspfilter,tp,LOCATION_MZONE,0,nil,tp,e:GetHandler())
	return rg:CheckSubGroup(s.hspchk,3,3,tp,e:GetHandler())
end
function s.hsptg(e,tp,eg,ep,ev,re,r,rp,chk,c)
	local rg=Duel.GetMatchingGroup(s.hspfilter,tp,LOCATION_MZONE,0,nil,tp,e:GetHandler())
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_RELEASE)
	local sg=rg:SelectSubGroup(tp,s.hspchk,true,3,3,tp,e:GetHandler())
	if sg then
		sg:KeepAlive()
		e:SetLabelObject(sg)
		return true
	else return false end
end
function s.hspop(e,tp,eg,ep,ev,re,r,rp,c)
	local g=e:GetLabelObject()
	Duel.Release(g,REASON_SPSUMMON)
	g:DeleteGroup()
end
function s.indcon(e)
	return Duel.IsExistingMatchingCard(aux.TRUE,e:GetHandlerPlayer(),LOCATION_FZONE,LOCATION_FZONE,1,nil)
end
function s.chcon(e,tp,eg,ep,ev,re,r,rp)
	local ec=re:GetHandler()
	local b1=re:GetHandler():IsRelateToEffect(re) and ec:IsSetCard(0x2cd)
	local b2=re:GetActivateLocation()==LOCATION_MZONE and not ec:IsLocation(LOCATION_MZONE) and ec:IsPreviousSetCard(0x2cd)
	return rp==tp and re:IsActiveType(TYPE_MONSTER) and (b1 or b2)
end
function s.chtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(aux.TRUE,rp,0,LOCATION_ONFIELD,1,nil,rp) end
end
function s.chop(e,tp,eg,ep,ev,re,r,rp)
	local g=Group.CreateGroup()
	Duel.ChangeTargetCard(ev,g)
	Duel.ChangeChainOperation(ev,s.repop)
end
function s.repop(e,tp,eg,ep,ev,re,r,rp)
	local sg=Duel.GetMatchingGroup(aux.TRUE,tp,0,LOCATION_ONFIELD,nil)
	Duel.Destroy(sg,REASON_EFFECT)
end