Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
This card's name becomes "Umi" while on the field or in the GY. Your opponent cannot target WATER monsters you control with non-WATER monster effects. At the start of the Battle Phase: You can Special Summon from your hand or GY, 1 monster that mentions "Umi", or 1 WATER Normal Monster, in Defense Position, but destroy it at the end of this Battle Phase. You can only use this effect of "Sea Stealth II" once per turn. * The above text is unofficial and describes the card's functionality in the OCG.
--潜海奇襲Ⅱ
--Sea Stealth II
--Scripted by The Razgriz
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e0=Effect.CreateEffect(c)
	e0:SetType(EFFECT_TYPE_ACTIVATE)
	e0:SetCode(EVENT_FREE_CHAIN)
	c:RegisterEffect(e0)
	--Its name becomes "Umi"
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e1:SetCode(EFFECT_CHANGE_CODE)
	e1:SetRange(LOCATION_SZONE|LOCATION_GRAVE)
	e1:SetValue(CARD_UMI)
	c:RegisterEffect(e1)
	--WATER monsters cannot be targeted by non-WATER monsters' effects
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetProperty(EFFECT_FLAG_IGNORE_IMMUNE)
	e2:SetCode(EFFECT_CANNOT_BE_EFFECT_TARGET)
	e2:SetRange(LOCATION_SZONE)
	e2:SetTargetRange(LOCATION_MZONE,0)
	e2:SetTarget(aux.TargetBoolFunction(Card.IsAttribute,ATTRIBUTE_WATER))
	e2:SetValue(s.ntval)
	c:RegisterEffect(e2)
	--Special Summon 1 monster that mentions "Umi" or 1 WATER Normal Monster from your hand or GY
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,0))
	e3:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e3:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e3:SetCode(EVENT_PHASE|PHASE_BATTLE_START)
	e3:SetRange(LOCATION_SZONE)
	e3:SetCountLimit(1,id)
	e3:SetTarget(s.sptg)
	e3:SetOperation(s.spop)
	c:RegisterEffect(e3)
end
s.listed_names={CARD_UMI}
function s.ntval(e,re,rp)
	if not (re:IsMonsterEffect() and rp==1-e:GetHandlerPlayer()) then return false end
	local attr,eff=Duel.GetChainInfo(0,CHAININFO_TRIGGERING_ATTRIBUTE,CHAININFO_TRIGGERING_EFFECT)
	if eff==re then
		return attr~=ATTRIBUTE_WATER
	else
		return re:GetHandler():IsAttributeExcept(ATTRIBUTE_WATER)
	end
end
function s.spfilter(c,e,tp)
	return ((c:IsMonster() and c:ListsCode(CARD_UMI)) or (c:IsType(TYPE_NORMAL) and c:IsAttribute(ATTRIBUTE_WATER)))
		and c:IsCanBeSpecialSummoned(e,0,tp,false,false,POS_FACEUP_DEFENSE)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsExistingMatchingCard(s.spfilter,tp,LOCATION_HAND|LOCATION_GRAVE,0,1,nil,e,tp) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_HAND|LOCATION_GRAVE)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if Duel.GetLocationCount(tp,LOCATION_MZONE)<=0 then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local tc=Duel.SelectMatchingCard(tp,aux.NecroValleyFilter(s.spfilter),tp,LOCATION_HAND|LOCATION_GRAVE,0,1,1,nil,e,tp):GetFirst()
	if tc and Duel.SpecialSummon(tc,0,tp,tp,false,false,POS_FACEUP_DEFENSE)>0 then
		local ct=Duel.GetTurnCount()
		--Destroy it at the end of this Battle Phase
		aux.DelayedOperation(tc,PHASE_BATTLE,id,e,tp,function(ag) Duel.Destroy(ag,REASON_EFFECT) end,function() return Duel.GetTurnCount()==ct end)
	end
end