Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
2 Level 5 WATER monsters Once per turn (Quick Effect): You can detach 1 material from this card; double this card's ATK until the end of your opponent's turn, also, any battle damage it inflicts to your opponent this turn is halved.
--No.73 激瀧神アビス・スプラッシュ
--Number 73: Abyss Splash
local s,id=GetID()
function s.initial_effect(c)
	--xyz summon
	Xyz.AddProcedure(c,aux.FilterBoolFunctionEx(Card.IsAttribute,ATTRIBUTE_WATER),5,2)
	c:EnableReviveLimit()
	--Increase ATK
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_ATKCHANGE)
	e1:SetType(EFFECT_TYPE_QUICK_O)
	e1:SetProperty(EFFECT_FLAG_DAMAGE_STEP)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetHintTiming(TIMING_DAMAGE_STEP)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCountLimit(1)
	e1:SetCondition(aux.StatChangeDamageStepCondition)
	e1:SetCost(Cost.DetachFromSelf(1))
	e1:SetOperation(s.atkop)
	c:RegisterEffect(e1)
end
s.xyz_number=73
function s.atkop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:IsRelateToEffect(e) and c:IsFaceup() then
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_SET_ATTACK_FINAL)
		e1:SetValue(c:GetAttack()*2)
		e1:SetReset(RESETS_STANDARD_DISABLE_PHASE_END|RESET_OPPO_TURN)
		c:RegisterEffect(e1)
		local e2=Effect.CreateEffect(c)
		e2:SetType(EFFECT_TYPE_SINGLE)
		e2:SetCode(EFFECT_CHANGE_BATTLE_DAMAGE)
		e2:SetValue(aux.ChangeBattleDamage(1,HALF_DAMAGE))
		e2:SetReset(RESETS_STANDARD_DISABLE_PHASE_END)
		c:RegisterEffect(e2)
	end
end