You can earn 60 pack hourglasses for a measly 60 Trade Tokens using this method
As the second ability resolves, first the next opponent in turn order (or, if it's an opponent's turn, the opponent whose turn it is) chooses a card in hand without revealing it, then each other opponent in turn order does the same
Sin will remain in the zone it went to when it died (which is usually the graveyard)
And it flies and has the right toughness, but it's a bit harder to cast with triple Blue and may not be castable when you are on six mana, but it's still pretty synergetic here
Given you typically have several of each of the parts it is quite likely you will find a five card section of your deck containing the two you need
If either one showed up now, no one would believe them