Auramancer – Odyssey common. One of the hard rules of Magic card naming—with a few exceptions—is that a card's name only contains a game term if it actually has something to do with that game element mechanically. That rule, of course, can only apply to game terms that existed at the time. Even though "Aura" is now an enchantment subtype, this little 'mancer can mance any kind of enchantment, Aura or no.
Llanowar Elves – Alpha common. Giant Spider has finally emerged as the Core Set Survivor, but Llanowar Elves has a heck of a bad beat story. Beloved enough to make the cut in the modern era despite a misleadingly plural name, the Elves has been in every core set but one: Eighth Edition, when it lost out to Birds of Paradise as part of the "Selecting Eighth Edition" promotion here on the site.
Archon of Justice – Eventide rare. In its original printing, Archon of Justice's rules text was eighteen words long. When it returns in Magic 2012, the new "dies" terminology will have cut that length fully in half. If this rate of text loss continues—50% every three years—by 2020 the Archon will have only a single word in its text box.
Mind Control – Magic 2011 uncommon. Mind Control was a reconcepting of Persuasion, which in turn was a fairly costed version of the classic Control Magic. So what kind of creature-stealing did get you in the old days? Treachery. Not only did you steal a creature, you got to untap your lands. Seems fair!
Stranglehold – Magic: The Gathering Commander rare. We don't have trivia for this card; we just wanted everyone to enjoy the flavor text: "The correct answer to a barbarian's riddle is to choke on your cleverness and die."
Bazaar Trader – Worldwake rare. Wait a minute! That's not "trading" so much as it is "giving things away for free," right? What kind of crazy bazaar is this?
Traitor's Clutch – Time Spiral common. The Time Spiral card Traitor's Clutch has the power to turn any 0/1 into a pretty good simulation of The Time Spiral card Nether Traitor. Some of the references in that block are just to the block itself!
Maga, Traitor to Mortals – Saviors of Kamigawa rare. After the sack of Minamo, Maga took to wandering Takenuma while trying to learn more about oni. Eventually, as his name implies, he became more sympathetic to the spirits than to humans.
Sedris, the Traitor King – Shards of Alara mythic rare. Sedris was the last living ruler of Vithia, but sold his kingdom and his soul to the first demon lords. Now, he rules as a powerful lich over the land known as "Grixis"—Vithian for "Traitor".
Glissa, the Traitor – Mirrodin Besieged mythic rare. Glissa was held in stasis by the Phyrexians until it was time to take over Mirrodin. When the Mirrodin-Phyrexia war began, Glissa returned to the Tangle to carry out the will of her dark masters.
Cao Ren, Wei Commander – Portal Three Kingdoms rare. Horsemanship is an ability that's been used only in Portal Three Kingdoms (and online Masters Edition sets that used cards from that set). It's essentially the same thing as flying, but since very few of the characters in the Romance of the Three Kingdoms had wings, it got a new flavor.
Blighted Agent – New Phyrexia common. Now that the Phyrexians have won the war for Mirrodin, the factions are turning on each other. Judging by its flavor text, Blighted Agent's unblockability is mostly used for spying on Urabrask the Hidden's sealed furnace layer.
War Report – New Phyrexia common. It's been a long time since a block's plot played out entirely on cards. Back in the Weatherlight Saga, if something important happened (like Stark realizing that Volrath was possessing Takara), it was bound to be mentioned somewhere (like the flavor text of Vendetta). Some plot points still show up on cards, though. For example, War Report's flavor text contains the actual end of the Mirran-Phyrexian War!