I figured that this is such a big thing that it deserves its own topic.
Ever since we first started War, people have been asking about Team Rainbow. If we decrease team sizes for War #3, having a new 14th team would help compensate the decreasing number of overall participants.
If we did have a Team Rainbow, there are three major questions:
1. Who leads Team Rainbow?
2. What kind of Vault building rules do they have?
3. What kind of deckbuilding rules they have?
Here's one example of how we could do the deckbuilding for Team Underworld and Team Rainbow:
Team Underworld - maximum of 3 copies of a single card. This restriction does not apply to Pillars or Pendulums. - At least 50% of cards in the deck have to belong to a specific element. In other words, it's the same rule that all the 12 regular War teams have, with the exception that each of the Team Underworld players get to pick their own "main" element each round. | Team Rainbow - maximum of 3 copies of a single card. This restriction does not apply to Pillars or Pendulums. - All decks must be rainbow decks (cards from 5 or more elements) - Can only use Quantum Pillars or Towers. All other Pillars or Towers are prohibited. |
Team Underworld would have the advantage of being able to use any "main" element, but the disadvantage of 3 card limit.
Team Rainbow would have the advantage of using rainbow decks, but the disadvantage of having to use rainbow decks, plus the same 3 card limit.
I think this kind of deckbuilding rule would make these two teams totally different, therefore having both would make more sense.

Icon design by Bloodshadow
Post your ideas and comments.