There are a handful of previously banned cards that were nerfed and made legal in the format again
Even though there are a lot of slots given to the few unusual inclusions there are still ten main-deck counterspells, a Gush, and Dig Through Time
Thats been the case with recent expansions, so if you missed out, dont worry too much
Also, thanks to its increased toughness, Vivi should be able to hold its own in plenty of combat encounters
Colorless Cycling This at minimum costs Shards of Alara does this, notably on Scourge had good success with its mechanic called " With Domain decided as our five-color mechanic, we invented a new mana-fixing keyword ability and spread it onto some common spells
711.3b If a checklist card is used in a deck, the double-faced card it represents is set aside prior to the beginning of the game (see rule 103.1a) and must remain available throughout the game