Colorless Energy doesnt actually have a card in the game
Funnily enough, at the time it was revealed, it wasnt as hyped up as Grief and Solitude, but has ultimately ended up as one of the better ones in the cycle behind Solitude but about on-par with Endurance and ahead of Grief and Subtlety
This complexity might limit its appeal in faster formats like Modern, but it's less of an issue in Commander, and, of course, not at all on Arena
So long as you keep cards that can remove damage from these characters on standby (like Dinglehopper, Hakuna Matata, or Cinderella, Gentle and Kind) you should be able to keep the gravy train rolling until victory is yours
6 energy can get you three cards, so if you cast this, its practically like drawing two cards for just 1 mana
This leads me to a little secret that only a few people know about