Forest – Duel Decks: Knights vs. Dragons basic land. The Forests in Duel Decks products have all been seen before. But in Duel Decks: Knights vs. Dragons, the art by Scott Bailey and Mike Ploog isn't from an expansion. Instead, they're the "European Lands" from back in 2000. They got a second run in in 2008.
Phyrexian Hulk – Tempest uncommon. Phyrexians seem prone to creating 5/4 vanilla artifact creatures. The standard Phyrexian Hulk originally appeared in Tempest and it returns in New Phyrexia.
Enslave – Planar Chaos uncommon. The Planar Chaos art for Enslave shows a black-aligned wizard taking control of a red-aligned dragon. And if you look at the wallpaper-sized art, you can see some fascinating black slime oozing from the dragon's eyes. Weird!
Evil Presence – Limited Edition Alpha uncommon. Evil Presence was a part of Magic from its very first core set, and it stuck around through Fifth Edition. And except for a brief cameo in Masters Edition III, it hasn't been seen since then. Until New Phyrexia, which brings it back! Note that this should not be confused with the 2008 holiday promo card.
Mountain – Arabian Nights basic land. To fill out the sheet, Mountain was added to Arabian Nights. Consequently, "Mountain" is the most common basic land, but "Arabian Nights Mountain" is the least common. Unless you want to figure out what various Theme Decks, Intro Packs, Event Decks, and Duel Decks have done to the overall basic land count.
Rare-B-Gone – Unhinged rare. Rare-B-Gone was printed before mythic rares existed, but Un-Rules Manager Mark Rosewater has ruled that it affects them just like it does regular rares.
Giant Badger – HarperPrism Book Insert. Giant Badger was one of five cards available by mailing in a coupon found in the back of a Magic novel. Giant Badger got reprinted in Eighth Edition, which finally relieved the massive Badger-related demand.
Familiar chacal – Magic 2010 common. The Spanish printing of Jackal Familiar has a translation mistake on it. It says, "El Familiar chacal no puede atacar ni bloquear," which translates as, "Jackal Familiar can't attack or block." It should say that Jackal Familiar can't attack or block alone.
Phyrexian Grimoire – Tempest rare. Although most tournament formats allow you to rearrange your graveyard as much as you like, Eternal formats like Vintage and Legacy still require you to keep the cards where they were originally placed. Why? Cards like Nether Shadow and Phyrexian Grimoire, that's why. Well, mostly the Shadow.
April 1, 2011 – Gregorian Calendar day. This day marked the 91st anniversary of the birth of Toshirō Mifune. April 1 is normally the 91st day of the year, although leap years push it to 92nd. In 2011, it appeared on a Friday, which is one of the seven possibilities. In some parts of the world, the weather was very pleasant, although it was less so elsewhere.