The rules for the modern format of Magic the Gathering is slightly different from standard.
With the exception of basic land cards, a player’s combined deck and sideboard may not contain more than four of any individual card just like normal.

Decks have to have at least 60 cards from the following series:

• Eighth Edition
• Mirrodin
• Darksteel
• Fifth Dawn
• Champions of Kamigawa
• Betrayers of Kamigawa
• Saviors of Kamigawa
• Ninth Edition
• Ravnica: City of Guilds
• Guildpact
• Dissension
• Coldsnap
• Time Spiral
• Planar Chaos
• Future Sight
• Tenth Edition
• Lorwyn
• Morningtide
• Shadowmoor
• Eventide
• Shards of Alara
• Conflux
• Alara Reborn
• Magic 2010
• Zendikar
• Worldwake
• Rise of the Eldrazi
• Magic 2011
• Scars of Mirrodin
• Mirrodin Besieged
• New Phyrexia
• Magic 2012
• Innistrad (effective September 30, 2011)