Summer Bloom

• WWizards of the Coast2004-10-04
  Official Ruling
  This spell increases the number of lands you can play in a turn. The land cards are played as you would normally play lands.

Rulings via Scryfall

• WO
  Wizards of the Coast2016-01-18

  Summer Bloom was banned in modern on January 18, 2016. We look for competitively viable decks that frequently win before the fourth turn. The Amulet Bloom deck has reached a performance level that is consistent with those criteria. For those reasons, Summer Bloom is banned from Modern. Source: https://magic.wizards.com/en/news/news/january-18-2016-banned-and-restricted-announcement-2016-01-18