Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Cannot be Normal Summoned/Set. Must be Special Summoned (from your hand) by Tributing all monsters you control. This card's ATK becomes the combined original ATK of the Tributed monsters. If this card attacks a Defense Position monster, inflict piercing battle damage.
--真魔獣 ガーゼット
--Legendary Maju Garzett
local s,id=GetID()
function s.initial_effect(c)
	c:EnableReviveLimit()
	--spsummon condition
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_UNCOPYABLE)
	e1:SetCode(EFFECT_SPSUMMON_CONDITION)
	c:RegisterEffect(e1)
	--special summon
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetCode(EFFECT_SPSUMMON_PROC)
	e2:SetProperty(EFFECT_FLAG_UNCOPYABLE)
	e2:SetRange(LOCATION_HAND)
	e2:SetCondition(s.spcon)
	e2:SetOperation(s.spop)
	c:RegisterEffect(e2)
	--pierce
	local e3=Effect.CreateEffect(c)
	e3:SetType(EFFECT_TYPE_SINGLE)
	e3:SetCode(EFFECT_PIERCE)
	c:RegisterEffect(e3)
end
function s.cfilter(c)
	return c:GetSequence()<5
end
function s.spcon(e,c)
	if c==nil then return true end
	local tp=c:GetControler()
	local g=Duel.GetFieldGroup(tp,LOCATION_MZONE,0)
	local rg=Duel.GetReleaseGroup(tp)
	return (#g>0 or #rg>0) and g:FilterCount(Card.IsReleasable,nil)==#g 
		and g:FilterCount(s.cfilter,nil)+Duel.GetLocationCount(tp,LOCATION_MZONE)>0
end
function s.spop(e,tp,eg,ep,ev,re,r,rp,c)
	local g=Duel.GetReleaseGroup(tp)
	Duel.Release(g,REASON_COST)
	local atk=0
	local tc=g:GetFirst()
	for tc in aux.Next(g) do
		local batk=tc:GetTextAttack()
		if batk>0 then
			atk=atk+batk
		end
	end
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_SET_ATTACK)
	e1:SetValue(atk)
	e1:SetReset(RESET_EVENT|RESETS_STANDARD_DISABLE&~RESET_TOFIELD)
	c:RegisterEffect(e1)
end