Magic was first publicly introduced at the 1993 Origins convention in Fort Worth, Texas by Richard Garfield and was an immediate hit. The general release of the first set of 295 cards, now known as Limited Edition Alpha (LEA), occurred on August 5, 1993. The cards measured 2½" by 3½" and had a distinctive rounded edge not found on successive editions of the game. Limited Edition Beta (LEB) was released less than 2 months later on October 4, 1993: misprints were fixed, 2 cards missing from LEA and one basic land of each type were added for a total of 302 cards. Carti Mundi, the card printer, purchased a new 4mm corner diecut to give Magic cards the characteristic edge still used today. An even broader release, Unlimited Edition (2ED), occurred in December 1993: matching the cards in LEB, the border was changed from black to white, probably to hide edge wear that was cropping up on the Limited sets. All three of these first sets included the most famous —and most powerful— cards of any magic set: Black Lotus, Mox Pearl, Mox Sapphire, Mox Jet, Mox Ruby, Mox Emerald, Timetwister, Ancestral Recall and Time Walk (also known as the Power Nine). WOTC would follow up with 16 more official core sets in the first 25 years: the first seven, from Revised Edition (3ED) to Ninth Edition (9ED), using a white border, then reverting back to the more popular black border from Tenth Edition (10E) onwards.