To protect them, keep your cards in protective sleeves and store them in a cool, dry location, away from direct sunlight
It makes it a decent cantrip by fixing the hand in the starting turns of the game, and later can be an enabler for combos in an Archlight Phoenix Jeskai deck or in an Esper Reanimator list
Steel characters, such as Anna True-Hearted, keep your quests safe with high resilience, while items like Imperial Bow give a significant combat advantage, granting keywords like Challenger and Evasive to tip fights in your favor
This one features a special sticker on the art box that is common among those found inside the Promo-A packs
I also love this with The Stick (Isochron Scepter), or casting everything from your library with Future Sight
Because of the newness of the format, it's really difficult to learn much from these bannings, and things are further complicated by the fact that in the early years of the format, Wizards used a restricted list (much like we have in Vintage today, where you can only play one copy of a restricted card in a deck) alongside the banned list, and while many cards were restricted in the early years (Balance, Fork, Zuran Orb, Black Vise, Land Tax, Hymn to Tourach, and Strip Mine), only two were outright banned