ActionHealthManager.cs

	public class ActionHealthManager : HealthManager
	{
		private readonly Action<Entity> _action;

		public ActionHealthManager(Entity entity, Action<Entity> action) : base(entity)
		{
			_action = action;
		}

		public override void TakeHit(Entity source, int damage = 1, DamageCause cause = DamageCause.Unknown)
		{
			_action?.Invoke(source);
		}

		public override void TakeHit(Entity source, Item tool, int damage = 1, DamageCause cause = DamageCause.Unknown)
		{
			_action?.Invoke(source);
		}
	}

Npc.cs

	public class Npc : PlayerMob
	{
		private static readonly ILog Log = LogManager.GetLogger(typeof (Npc));

		private readonly GameType _gameType;

		public Npc(string name, Level level, GameManager gameManager, string gameType) : this(name, level, gameManager, (GameType) Enum.Parse(typeof (GameType), gameType, true))
		{
		}

		public Npc(string name, Level level, GameManager gameManager, GameType gameType) : base(name, level)
		{
			_gameType = gameType;

			Skin = new Skin {Slim = false, Texture = Encoding.Default.GetBytes(new string('Z', 8192))};

			HealthManager = new ActionHealthManager(this, (source) =>
			{
				GamePlayer p = source as GamePlayer;
				if (p == null) return;

				p.SendMessage($"§eFinding you a game of §b{gameType}§e...");

				Task.Run(() => { gameManager.TransferToGame(p, _gameType); });
			});
		}
	}