Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
"Visas Starfrost" + 1 monster with 1500 ATK/2100 DEF Must be Special Summoned (from your Extra Deck) by banishing the above cards from your field and/or GY. Cannot be destroyed by battle. If this card is Special Summoned: You can target 1 other monster on the field; destroy it, and if you do, this card gains ATK equal to half of that monster's original ATK or DEF (whichever is higher).
--ヴィシャス＝アストラウド
--Vicious Astraloud
--Scripted by Hatter
local s,id=GetID()
function s.initial_effect(c)
	c:EnableReviveLimit()
	--"Visas Starfrost" + 1 monster with 1500 ATK/2100 DEF
	Fusion.AddProcMix(c,true,true,CARD_VISAS_STARFROST,s.matfilter)
	Fusion.AddContactProc(c,s.contactfil,s.contactop,true)
	--Destroy 1 other monster
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_DESTROY+CATEGORY_ATKCHANGE)
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET+EFFECT_FLAG_DELAY)
	e1:SetCode(EVENT_SPSUMMON_SUCCESS)
	e1:SetTarget(s.destg)
	e1:SetOperation(s.desop)
	c:RegisterEffect(e1)
	--Cannot be destroyed by battle
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE)
	e2:SetCode(EFFECT_INDESTRUCTABLE_BATTLE)
	e2:SetValue(1)
	c:RegisterEffect(e2)
end
s.listed_names={CARD_VISAS_STARFROST}
function s.matfilter(c)
	return c:IsMonster() and c:IsAttack(1500) and c:IsDefense(2100)
end
function s.contactfil(tp)
	local loc=LOCATION_ONFIELD|LOCATION_GRAVE
	if Duel.IsPlayerAffectedByEffect(tp,CARD_SPIRIT_ELIMINATION) then loc=LOCATION_ONFIELD end
	return Duel.GetMatchingGroup(Card.IsAbleToRemoveAsCost,tp,loc,0,nil)
end
function s.contactop(g)
	Duel.Remove(g,POS_FACEUP,REASON_COST|REASON_MATERIAL)
end
function s.destg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	local c=e:GetHandler()
	if chkc then return chkc:IsLocation(LOCATION_MZONE) and chkc~=c end
	if chk==0 then return Duel.IsExistingTarget(nil,tp,LOCATION_MZONE,LOCATION_MZONE,1,c) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_DESTROY)
	local g=Duel.SelectTarget(tp,nil,tp,LOCATION_MZONE,LOCATION_MZONE,1,1,c)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,g,1,0,0)
end
function s.desop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if not tc:IsRelateToEffect(e) or Duel.Destroy(tc,REASON_EFFECT)==0 then return end
	local c=e:GetHandler()
	local val=math.max(tc:GetTextAttack(),tc:GetTextDefense())//2
	if val>0 and c:IsRelateToEffect(e) and c:IsFaceup() then
		c:UpdateAttack(val,RESET_EVENT|RESETS_STANDARD_DISABLE)
	end
end