Ooooo sounds interesting can we get some definitive info on this?
I purchased one myself, i received a swift song level 9 out of it, a lv70 enchant. I can't give any definite answers on what all can be acquired from it because it is a 'fairly' new items that's being put out.
The item is permanent
and will not go away after use, it is not timed like other items.
Here is a Screen Shot of the Wonder packet (the icon is on cooldown, but still)