Format refers to the ways you can play standard matches. Playing in Rotation format allows you to play using the five most recent card sets and basic cards in a match. Unlimited format allows you to use all available cards in a match.

• 

  In Rotation format, you can use the five most recent card sets and basic cards in a match. This format is recommended for players new to Shadowverse.

  Usable Cards as of December 26, 2018 (PT)

  7th Card Set: Chronogenesis
  8th Card Set: Dawnbreak, Nightedge
  9th Card Set: Brigade of the Sky
  10th Card Set: Omen of the Ten
  11th Card Set: Altersphere
  Basic cards (starter cards, main story rewards, Harnessed Flame, Harnessed Glass)

• 

  In Unlimited format, players can use all available cards. Note that there may be some restrictions placed on cards.

  One-Card Restrictions as of September 26, 2018 (PT)

  Blood Wolf
  Aria, Guiding Fairy
  Mysterian Knowledge
  Gremory