Read the official announcement from WotC.
Colorless Both Magic and Final Fantasy combine technology and the arcane, whether it be Cait Sith or Karn, and, of course, tons of swords, guns, gunswords, swords with guns attached, and guns made of swords, so we should see an interesting array of colourless cards on offer
Because these are personal picks, they aren't based solely on value or widespread opinion, so please be sure to give us your Top Five in the comments
On top of it all, theyre a way to keep cards balanced, spreading value and utility across each stage of having the card in play
It adds first strike, plus the potential to free-cast more expensive cards if you can stockpile extra energy before playing it