The aura Angelic Destiny has a triggered ability that causes Angelic Destiny to be returned to your hand when the enchanted creature dies. A creature ‘dies’ when it goes from the battlefield to a graveyard. If a creature is returned to a player’s hand from the battlefield, it has not died. This is true when a creature leaves play and goes to any zone other than the graveyard. This means if a creature enchanted by Angelic Destiny goes to a hand (Silent Departure), library (Grasp of Phantoms) or exile (Sever the Bloodline), Angelic Destiny’s ability will not trigger, and it just stays in the graveyard.