You have become adept at laying ambushes and quickly escaping danger. You can take two turns in the initiative, your second turn always comes after everyone else. If you use the first turn to declare your intent to flee, the second, if you choose to use it, will only allow the cast of a defensive spell in order to make good your escape.
If your first turn is instead used for an offensive spell or defensive spell, you may then choose to flee on your second turn or ignore your second turn completely.