Masters Edition IV is a online-only product for Magic Online, that was released January 10, 2011. The design focused on cards from Beta, Arabian Nights, and Antiquities.
Masters Edition IV features 269 cards, including 105 rares, 72 uncommons, and 80 commons and 12 lands. All cards appear with their original artwork and original-style card frames.
Each Masters Edition IV booster pack contains 15 randomly sorted cards (1 rare, 3 uncommon, 10 common, and 1 of the following non-basic lands: Urza's Mine, Urza's Power Plant, or Urza's Tower. These lands made the creation of "Urzatron" decks viable in draft. The cards are not redeemable. A light tribal theme supported Birds, Zombies, Goblins and Elephants.
Some rarities were changed. Angelic Voices, Blaze of Glory and Savannah Lions changed from rare to uncommon. Conversion from uncommon to rare. Red Elemental Blast and Blue Elemental Blast became uncommon instead of common. Just Fate went from rare to common.
Magic: The Gathering sets