Edited sentence: Golgothian Sylex: The second card to care about what expansion another card is from (the first is Arabian Nights' City in a Bottle).Hurkyl's Recall: In an expansion with so many artifacts, returning all artifacts in play to an owner's hand could be devastating, particularly when combined with cards that do damage based on the number of cards in one's hand such as the Black Vise.Millstone became a staple of deckbuilding for years, and even today, any effect that puts cards from one's library to their graveyard is known as "milling".Millstone: A card created to take advantage of the rule that stated that players lost the game when they ran out of cards in their deck.Mishra's Factory: As the first land that becomes a creature, the Factory has been used time and again as an uncounterable threat in control decks.Mishra's Workshop: A degenerate mana-booster for artifacts, the Workshop is the highest-priced card of the set today.Strip Mine: A land that can be used for colorless mana (perfect for casting artifacts), or sacrificed to destroy a land in play.The concept of affecting cards from a specific set was soon abandoned due to the fact that many cards originally printed in these expansions began appearing in the main set with no expansion symbols at all.This artifact ties into the ending of the Antiquities storyline, as Urza activates the sylex bowl and  Obliterates the forest of Argoth, as well as two whole armies with it.This is the cornerstone of the entire Prison archetype in Vintage, that uses the mana abundance of workshop to play relatively expensive game-warping artifacts on the first turn.This mana denial later proved powerful enough to restrict it in Vintage