Unlike other similar huge seven-casting cost flyers (Blizzard Elemental, anyone?), it gave you the mana on the turn you played it to save it
If you're looking to hunt any of these rare cards down, your best bet is picking up a Collector Booster set from Amazon right now, but be prepared to pay around $480 for just 12 packs
Equipped with its Buster Sword or any Mirran sword, Cloud is extremely dangerous with its trigger-doubling skill
Boros Charm, along with the printing of Boltwave, gives Red decks a new identity in Standard, allowing for a Burn shell to exist, with already existing cards like Monastery Swiftspear, Lightning Strike, and Screaming Nemesis
A late-game Cyclonic Rift may as well be a proper board wipe, as it forces you to discard multiple cards to the hand size limit unless you can somehow manage to pay enough mana to re-cast all your permanents
Besides, mishandling even the best sleeves can break or damage your cards