[Command] [FSOD] Vanish Command

    internal class VanishCommand : Command
    {
        public VanishCommand()
        : base("vanish", 1)
        {
        }

        protected override bool Process(Player player, RealmTime time, string[] args)
        {
            if (!player.isNotVisible)
            {
                player.isNotVisible = true;
                player.Owner.PlayersCollision.Remove(player);
                if (player.Pet != null)
                    player.Owner.LeaveWorld(player.Pet);
                player.SendInfo("You're now hidden from all players!");
                return true;
            }
            player.isNotVisible = false;

            player.SendInfo("You're now visible to all players!");
            return true;
        }
    }

        public bool PvP { get; set; }
        public bool isNotVisible = false;

        public void Damage(int dmg, Entity chr, bool noDef, bool toSelf = false, float pvpReduction = 0.20f)
        {
            try
            {
                if (HasConditionEffect(ConditionEffects.Paused) ||
                    HasConditionEffect(ConditionEffects.Stasis) ||
                    HasConditionEffect(ConditionEffects.Invincible))
                    return;

                dmg = (int)StatsManager.GetDefenseDamage(dmg, noDef);
                if (chr is Player)
                    dmg = Math.Max(1, (int)(dmg * pvpReduction));
                if (!HasConditionEffect(ConditionEffects.Invulnerable))
                    HP -= dmg;
                UpdateCount++;
                Owner.BroadcastPacket(new DamagePacket
                {
                    TargetId = Id,
                    Effects = 0,
                    Damage = (ushort)dmg,
                    Killed = HP <= 0,
                    BulletId = 0,
                    ObjectId = chr != null ? chr.Id : -1
                }, toSelf ? null : this);
                SaveToCharacter();

                string killerName = chr is Player
                    ? chr.Name
                    : chr != null ? (chr.ObjectDesc.DisplayId ?? chr.ObjectDesc.ObjectId) : "Unknown";

                if (HP <= 0)
                    Death(killerName);
            }
            catch (Exception e)
            {
                log.Error("Error while processing playerDamage: ", e);
            }
        }

            }, null);
            if (!isNotVisible)
                Owner.BroadcastPacket(new ShowEffectPacket
                {
                    EffectType = EffectType.Teleport,
                    TargetId = Id,
                    PosA = new Position
                    {
                        X = X,
                        Y = Y
                    },
                    Color = new ARGB(0xFFFFFFFF)
                }, null);
        }

             private IEnumerable<int> GetRemovedEntities()
        {
            foreach (Entity i in clientEntities.Where(i => i is Player))
            {
                    if ((i as Player).isNotVisible && i != this && !PvP)
                {
                    yield return i.Id;
                }
                if (i is Player && i.Owner != null) continue;
                if (MathsUtils.DistSqr(i.X, i.Y, X, Y) > SIGHTRADIUS * SIGHTRADIUS &&
                    !(i is StaticObject && (i as StaticObject).Static) &&
                    i != Quest)
                {
                    if (i is Pet) continue;
                    yield return i.Id;
                }
                else if (i.Owner == null)
                    yield return i.Id;

                if ((i as Player).isNotVisible && i != this && !PvP)
                    yield return i.Id;
            }
        }
            }
        }