Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
You can target up to 3 "Therion" monsters in your GY; Special Summon this card from your hand, and if you do, equip them to this card. You can discard 1 "Endless Engine Argyro System"; destroy all cards your opponent controls. While this card is equipped to a monster: You can Special Summon this card, then equip the monster this card was equipped to, to this card. You can only use each effect of "Therion Irregular" once per turn.
--セリオンズ・イレギュラー
--Therion Irregular
--Scripted by Eerie Code
local s,id=GetID()
function s.initial_effect(c)
	--Special Summon this card from your hand and equip up to 3 "Therion" monsters from your GY to it
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON+CATEGORY_EQUIP)
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetRange(LOCATION_HAND)
	e1:SetCountLimit(1,{id,0})
	e1:SetTarget(s.hsptg)
	e1:SetOperation(s.hspop)
	c:RegisterEffect(e1)
	--Destroy all cards your opponent controls
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_DESTROY)
	e2:SetType(EFFECT_TYPE_IGNITION)
	e2:SetRange(LOCATION_MZONE)
	e2:SetCountLimit(1,{id,1})
	e2:SetCost(s.descost)
	e2:SetTarget(s.destg)
	e2:SetOperation(s.desop)
	c:RegisterEffect(e2)
	--Special Summon this card that is equipped to a monster
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,2))
	e3:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e3:SetType(EFFECT_TYPE_IGNITION)
	e3:SetRange(LOCATION_SZONE)
	e3:SetCountLimit(1,{id,2})
	e3:SetCondition(function(e) return e:GetHandler():GetEquipTarget() end)
	e3:SetTarget(s.eqsptg)
	e3:SetOperation(s.eqspop)
	c:RegisterEffect(e3)
end
s.listed_series={SET_THERION}
s.listed_names={CARD_ARGYRO_SYSTEM}
function s.eqfilter(c)
	return c:IsSetCard(SET_THERION) and c:IsMonster() and not c:IsForbidden()
end
function s.hsptg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_GRAVE) and chkc:IsControler(tp) and s.eqfilter(chkc) end
	local c=e:GetHandler()
	local ft=Duel.GetLocationCount(tp,LOCATION_SZONE)
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0 and ft>0
		and Duel.IsExistingTarget(s.eqfilter,tp,LOCATION_GRAVE,0,1,nil)
		and c:IsCanBeSpecialSummoned(e,0,tp,false,false) end
	ft=math.min(ft,3)
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_EQUIP)
	local g=Duel.SelectTarget(tp,s.eqfilter,tp,LOCATION_GRAVE,0,1,ft,nil)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,c,1,tp,0)
	Duel.SetOperationInfo(0,CATEGORY_EQUIP,g,#g,tp,0)
end
function s.hspop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if not c:IsRelateToEffect(e) or Duel.SpecialSummon(c,0,tp,tp,false,false,POS_FACEUP)==0 then return end
	local tg=Duel.GetTargetCards(e):Match(aux.NOT(Card.IsForbidden),nil)
	if #tg==0 then return end
	local ft=Duel.GetLocationCount(tp,LOCATION_SZONE)
	if ft>0 and #tg>ft then
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_EQUIP)
		tg=tg:Select(tp,ft,ft)
	end
	for tc in tg:Iter() do
		if Duel.Equip(tp,tc,c,true,true) then
			--Equip limit
			local e1=Effect.CreateEffect(c)
			e1:SetType(EFFECT_TYPE_SINGLE)
			e1:SetProperty(EFFECT_FLAG_OWNER_RELATE)
			e1:SetCode(EFFECT_EQUIP_LIMIT)
			e1:SetValue(function(e,c) return e:GetOwner()==c end)
			e1:SetReset(RESET_EVENT|RESETS_STANDARD)
			tc:RegisterEffect(e1)
		end
	end
	Duel.EquipComplete()
end
function s.descostfilter(c)
	return c:IsCode(CARD_ARGYRO_SYSTEM) and c:IsDiscardable()
end
function s.descost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.descostfilter,tp,LOCATION_HAND,0,1,nil) end
	Duel.DiscardHand(tp,s.descostfilter,1,1,REASON_COST|REASON_DISCARD)
end
function s.destg(e,tp,eg,ep,ev,re,r,rp,chk)
	local dg=Duel.GetMatchingGroup(nil,tp,0,LOCATION_ONFIELD,nil)
	if chk==0 then return #dg>0 end
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,dg,#dg,tp,0)
end
function s.desop(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetMatchingGroup(nil,tp,0,LOCATION_ONFIELD,nil)
	if #g>0 then
		Duel.Destroy(g,REASON_EFFECT)
	end
end
function s.eqsptg(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and c:IsCanBeSpecialSummoned(e,0,tp,false,false) end
	local ec=c:GetEquipTarget()
	Duel.SetTargetCard(ec)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,c,1,tp,0)
	Duel.SetOperationInfo(0,CATEGORY_EQUIP,ec,1,tp,0)
end
function s.eqspop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if not c:IsRelateToEffect(e) or Duel.SpecialSummon(c,0,tp,tp,false,false,POS_FACEUP)==0 then return end
	local ec=Duel.GetFirstTarget()
	if not ec:IsRelateToEffect(e) then return end
	Duel.BreakEffect()
	if Duel.Equip(tp,ec,c) then
		--Equip limit
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
		e1:SetCode(EFFECT_EQUIP_LIMIT)
		e1:SetValue(function(e,_c) return _c==c end)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD)
		ec:RegisterEffect(e1)
	end
end