Kaleidoscope
This casual Magic Online-specific format is for fans of multi-color decks.
Every non-land in your deck must be a multicolor card—including split and hybrid cards that are more than one color.
Since it’s also a constructed format, the normal deck-building rules apply: minimum of sixty cards, optional 15-card sideboard, and no more than four of any card.
Like the legacy format, all sets and promotional cards are allowed.
Banned
At the moment (18th January 2016) two cards are banned in Kaleidoscope tournaments: