Interestingly, Energy does not disappear at the end of steps, phases, and even turns, allowing players to stockpile it for big plays
Miltank and her glorious udders made the list for obvious reasons, plus with a pose like that she is just waiting to be painted like one of those french girls
If adult interaction doesnt sway them, perhaps a few 90s blasts of color hosing could be just the thing to sideboard in while adjusting your decks at home
You can see a few of these below, or on the MTG site via the first-look announcement post
Note that backup confers only abilities that are printed below the backup ability
You might see it on creatures, as is the case with Codie, Vociferous Codex, but it is not being used as a creature type there