Really hoping it's an ongoing reward, even on a timer. I'm sure I've seen consumed on use references on in game items that give ongoing effects (can't remember what but I'm thinking mount calling items or minions or something along those lines) so hopefully this is along the same veins: use it and it stops being an item but unlocks the ability for the character. Hopefully we'll get a response as soon as the reps get back to work next week but we might just have to wait and see.