public void AssignBender(List <string> benderArgs)
    {
        var benderType = benderArgs[1];
        var benderName = benderArgs[2];
        var power      = int.Parse(benderArgs[3]);
        var integrity  = double.Parse(benderArgs[4]);

        Bender currBender = null;

        switch (benderType)
        {
        case "Air":
            currBender = new AirBender(benderName, power, integrity);
            airNation.Add(currBender);
            break;

        case "Fire":
            currBender = new FireBender(benderName, power, integrity);
            fireNation.Add(currBender);
            break;

        case "Water":
            currBender = new WaterBender(benderName, power, integrity);
            waterNation.Add(currBender);
            break;

        case "Earth":
            currBender = new EarthBender(benderName, power, integrity);
            earthNation.Add(currBender);
            break;
        }
    }