They had been told upfront that we were testing out a sixth color, and they expressed some amount of sadness when it wasn't as unique as they'd hoped it would be
White is surprisingly underpowered, red has options but many of them arent stellar, blue is tempo-focused but has a lot of options, black is in a great place, and green has access to (sometimes) a one mana Wild Instincts
The cards are ordered according to their TCGplayer market price, which is subject to change
(2018-04-27) The last ability of Firesong and Sunspeaker can't target a planeswalker or battle
Made it confusing to sleeve
The reason why theyre so valuable though, is because theyre all artifacts, you can play a land and one of these Mox on your first turn, giving you access to at least two mana for free on your first turn