--created by Discord \ Ace/Verloren, coded by Lyris, art from "Shellrokket Dragon"
--業が深いシェルヴァレット・ドラゴン
local s,id,o=GetID()
function s.initial_effect(c)
	aux.EnablePendulumAttribute(c)
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetCode(EFFECT_EXTRA_TOMAIN_KOISHI)
	e1:SetRange(LOCATION_PZONE)
	e1:SetTargetRange(LOCATION_EXTRA,0)
	e1:SetTarget(aux.TargetBoolFunction(Card.IsType,TYPE_PENDULUM))
	c:RegisterEffect(e1)
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_F)
	e2:SetCode(EVENT_CUSTOM+id)
	e2:SetCountLimit(1,id)
	e2:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e2:SetTarget(s.psptg)
	e2:SetOperation(s.pspop)
	c:RegisterEffect(e2)
	local e3=Effect.CreateEffect(c)
	e3:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_F)
	e3:SetCode(EVENT_DESTROYED)
	e3:SetRange(LOCATION_PZONE)
	e3:SetCountLimit(1,id+o*10)
	e3:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e3:SetCondition(s.dspcon)
	e3:SetTarget(s.dsptg)
	e3:SetOperation(s.dspop)
	c:RegisterEffect(e3)
	local e4=Effect.CreateEffect(c)
	e4:SetType(EFFECT_TYPE_QUICK_O)
	e4:SetCode(EVENT_CHAINING)
	e4:SetRange(LOCATION_MZONE)
	e4:SetCategory(CATEGORY_TOGRAVE+CATEGORY_DESTROY)
	e4:SetCondition(s.descon)
	e4:SetTarget(s.destg)
	e4:SetOperation(s.desop)
	c:RegisterEffect(e4)
	local e5=Effect.CreateEffect(c)
	e5:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e5:SetCode(EVENT_DESTROYED)
	e5:SetProperty(EFFECT_FLAG_DELAY)
	e5:SetCondition(s.pzcon)
	e5:SetTarget(s.pztg)
	e5:SetOperation(s.pzop)
	c:RegisterEffect(e5)
end
function s.psptg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_DECK)
end
function s.filter(c,e,tp,lv)
	return c:IsSetCard(0x102) and c:IsLevelBelow(lv-1) and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.pspop(e,tp,eg,ep,ev,re,r,rp)
	if Duel.GetLocationCount(tp,LOCATION_MZONE)<=0 then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	Duel.SpecialSummon(Duel.SelectMatchingCard(tp,s.filter,tp,LOCATION_DECK,0,1,nil,e,tp,2),0,tp,tp,false,false,POS_FACEUP)
end
function s.cfilter(c,tp)
	return c:IsSetCard(0x102) and c:IsPreviousLocation(LOCATION_MZONE) and c:IsPreviousControler(tp)
end
function s.dspcon(e,tp,eg,ep,ev,re,r,rp)
	return eg:IsExists(s.cfilter,1,nil,tp)
end
function s.dsptg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_DECK)
end
function s.dspop(e,tp,eg,ep,ev,re,r,rp)
	if Duel.GetLocationCount(tp,LOCATION_MZONE)<=0 then return end
	local g,lv=eg:Filter(s.cfilter,nil,tp):GetMaxGroup(Card.GetLevel())
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	Duel.SpecialSummon(Duel.SelectMatchingCard(tp,s.filter,tp,LOCATION_DECK,0,1,nil,e,tp,lv),0,tp,tp,false,false,POS_FACEUP)
end
function s.descon(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if not re:IsHasProperty(EFFECT_FLAG_CARD_TARGET) then return false end
	local g=Duel.GetChainInfo(ev,CHAININFO_TARGET_CARDS)
	return g and g:IsContains(c) and re:IsActiveType(TYPE_LINK)
end
function s.destg(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	local g=Duel.GetMatchingGroup(Card.IsType,tp,LOCATION_MZONE,LOCATION_MZONE,c,TYPE_FUSION+TYPE_SYNCHRO+TYPE_XYZ+TYPE_LINK)
	if chk==0 then return c:IsDestructable() and #g>0 end
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,c,1,0,0)
	Duel.SetOperationInfo(0,CATEGORY_TOGRAVE,g,1,0,0)
end
function s.desop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:IsRelateToEffect(e) and Duel.Destroy(c,REASON_EFFECT)>0 then
		local g=Duel.GetMatchingGroup(Card.IsType,tp,LOCATION_MZONE,LOCATION_MZONE,nil,TYPE_FUSION+TYPE_SYNCHRO+TYPE_XYZ+TYPE_LINK)
		if #g==0 then return end
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TOGRAVE)
		local sg=g:Select(tp,1,1,nil)
		Duel.HintSelection(sg)
		Duel.BreakEffect()
		Duel.SendtoGrave(sg,REASON_EFFECT)
	end
end
function s.pzcon(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	return c:IsPreviousPosition(POS_FACEUP) and c:IsPreviousLocation(LOCATION_ONFIELD) and rp==tp
		and c:IsReason(REASON_EFFECT)
end
function s.pztg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.CheckLocation(tp,LOCATION_PZONE,0) or Duel.CheckLocation(tp,LOCATION_PZONE,1) end
end
function s.pzop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:IsRelateToEffect(e) and Duel.MoveToField(c,tp,tp,LOCATION_PZONE,POS_FACEUP,true) then
		Duel.RaiseSingleEvent(c,EVENT_CUSTOM+id,e,REASON_EFFECT,tp,tp,0)
	end
end