This oversized trading card is part of the 1991 TSR Advanced Dungeons & Dragons trading card set.  It was available only through the Capitol City newsletter (a now defunct comic distributor).  The card measures 10 inches by 7.25 and is the only oversized card manufactured for the set.  It features the artwork of acclaimed fantasy illustrator Brom.  In nm/mint condition, it will be shipped with the utmost care. 

General Info about the set.

The 1991 TSR card set was the very first card set released to feature creatures, characters, weapons, and magic items from the Advanced Dungeons and Dragons game setting (including Dragonlance, Ravenloft, Forgotten Realms, Dark Sun, and Spelljammer).  And it was a particularly difficult set to complete.  

Released in the the early days of the chase card craze, in what would become common practice for most trading card companies, manufactures inserted chase cards into random packs.  These chase cards were usually part of a "sub-set" and were harder to find than regular cards in the set.  TSR decided to follow suit. However, they did not include any sort of chase card "sub-set" like holograms or foil cards.  Instead, they decided that regular and randomly numbered cards from the base set would be made "rare."  

Out of the ultimately 750 cards that comprise the 1991 AD&D trading card set, ten cards were selected from each Series to be very rare and twenty cards were selected to be somewhat rare.  Series I was the most rare, including ten cards that only 3,000 were printed and twenty cards that only 4,000 were printed.  Series II featured the same, but with 10,000 and 13,000 of each level of rare card instead of 3,000 and 4,000.  The common cards were printed in quantities of approximately 50,000 for Series I and 160,000 for Series II.  Overall, these production runs were pretty low compared to most card sets of the period, especially sports cards.  

Of note, cards 18-377 were released in packs (Series I) and cards 378-737 were also released in packs (Series II). But the other number cards were not included in any waxboxes. Cards 1-17 were included in Dragon Magazine #160 (released roughly a year prior to the release of Series I in 1991).  Cards 738-746 were promo cards and the last four cards in the set, 747-750, were available only in the factor set (and, consequently, have silver borders whereas all of the pack-pulled cards have gold borders).