Edited sentence: After a long hiatus, it was reprinted once again in Ninth Edition.Demonic Tutor: Considered the best "tutor" card in Magic, it was restricted in sanctioned tournaments due to its power level, and was not reprinted after Revised.Despite being the same card, Kird Ape lost some of its power without Taiga being in the same set.Diabolic Tutor, a more balanced substitute, was first printed in Odyssey.Due to power reasons, it is restricted in sanctioned tournaments, and has not been reprinted since Revised with the exception of a DCI Judges foil print run.Due to the demand that these lands produce, Wizards of the Coast has produced a number of subsequent lands that produce the same mana, but with certain drawbacks, such as the "Pain Lands" from Ice Age, or the Ravnica dual lands that either cause the player to lose life or come into play tapped.Fork was removed when the development team found the card to be "out of place" with the overall theme of "red" and it's targeting rules to be confusing.Fork:  A potentially potent Interrupt (now Instant), Fork allowed the player to copy a spell being played.Kird Ape: Together with the dual land Taiga, Kird Ape was potentially a very powerful 1-mana creature, and was a highly popular inclusion in Red-Green decks.Other cards, such as Wheel of Fortune, were removed for Fourth Edition for similar reasons.Sol Ring: An extremely efficient mana-acceleration card, some feel that it should be included in the Power Nine.The Dual Lands: Tundra, Underground Sea, Badlands, Taiga, Savannah, Scrubland, Volcanic Island, Bayou, Plateau, and Tropical Island.The Ravnica dual land  Stomping Ground has managed to serve as a replacement.These powerful and versatile lands are the only lands in Magic that can produce two different colors of mana with no drawback, making them highly sought-after.Unlike the Power Nine, Sol Ring was an uncommon instead of a rare, making it easier to acquire.While Revised was still in print, Fork was the most sought after valuable card in the set (since surpassed by others including the Dual Lands)