World

World is a supertype that is only found on enchantments. All existing cards with this supertype were printed as being Enchant World cards (which despite the "Enchant" typeline, were global enchantments and not local enchantments). World enchantments have been retired for many years.

Description
World enchantments were last seen in Visions. The plane cards introduced by the Planechase game variant have similar functionality. Note that legendary enchantments, which also have some of the same kind of gameplay as world enchantments, appeared in Kamigawa block. A World enchantment was included on two test cards from the Mystery Booster set; Problematic Volcano and Mana Abundance.

Change
The world supertype was dropped mostly because it didn't add much gameplay value to balance the complexity of the rules it added. It is usually a drawback to have your enchantments have a built-in destruction clause, and most of what world enchantments were designed to accomplish could be realized with a more straightforward global enchantment, as well.

Rules
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World Rule
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Rulings

 * Permanents put into a graveyard as a result of the "world rule" are not "destroyed" and thus can't be regenerated.
 * No player gets priority between the time a world permanent enters the battlefield and the time the "world rule" sends the world permanents that have been on the battlefield the longest to their owners' graveyards. In other words, they can't be sacrificed, returned to their owners' hands, or otherwise affected in response.
 * Unlike the "legend rule", the "world rule" doesn't care about the names of permanents. It cares only about the world supertype.