Celebi ex's one move, Powerful Bloom, only requires two energies and allows the player to flip a coin for each energy that Celebi has attached
Theres a satisfying strategic element here, since there are quite a few places to spend your energy, and only so many ways to produce it
You can only activate this effect of "Unending Nightmare" once per Chain
This can make Cresselia a sponge, but after three Energy and other Pokemon to set up, why would you ever attach more Energy to it
Genesys meanwhile is a brewers paradise, virtually unsolved even now, with a shocking diversity of decks that range from Exodia FTK to Linkless K9 Vanquish Soul
It does not top the set the way the headline Kyurem and full-art Pokemon SIRs do, but it holds a strong three-figure position for a Supporter, which is unusual