Sets released: Antiquities. Revised Edition, Legends, the Dark,
  Fallen Empires

Major changes:

  - The types 'poly artifact' and 'mono artifact' were dropped for
  Revised Edition.
  - The tilted-T tap symbol was introduced in Revised Edition.
  - Legends introduced Enchant World, the Legend creature type and
  Legendary lands, as well as gold-bordered cards with more than one
  color.

Trivia:

  - The original 'legend rule' restricted Legend cards to maximum one
  of each name per deck as well as maximum one of any name in play.

Some parts © 2009 Advameg, Inc.