When Revised was in production in 1994, a number of problems with the set became apparent. The colors were washed out, the picture for the Serendib Efreet was wrong, and there was a growing concern with the Satanic images on some of the cards. The solution was to print a "fixed" edition of Revised, code named "Edgar", that has since come to be known as "Summer Magic" (because it was printed in the summer of 1994).
However, there were many problems with Summer Magic as well. While Revised's colors were too light, Summer's were too dark, to the point that some cards were difficult to read. The Serendib Efreet was fixed, but now the Hurricane was printed with a blue background rather than green. Because of these and other problems, the entire print run was recalled and destroyed. This led to the great Revised shortage of 1994, which old-timers will remember.
A couple cases did make it out, to locations in England and Texas. These surviving Summer Magic cards are now quite rare and valuable—it is estimated that no more than 5 or 6 of each rare exist.