Imbued Melodies: This trait will activate when you use Scepter Fire three (Phoenix). If you are below the Threshold when the Phoenix returns to you it will activate the Magnetic Aura.
Overload: When you are in Mist Form you are still able to use Overload Skills. Leaving Mist Form will cancel the Overload Skills though.
Gale Song: This trait still activates when you are CC'd with Stability. This is the primary reason players do not use this trait in competitive modes, which is the only place it would be used anyway.