Once again, this is their color identity, which massively restricts deckbuilding options
Keep in mind though that the mileage for this card is dependent on having creatures in graveyards, so make sure youre able to either mill each player or have a way to destroy creatures with it out
And to be abundantly clear, ex Pokmon are still prevalent in the games strongest decks
If you change that cube by even a single card, youll be lowering the power level of the cube, meaning that there is only one set of interchangeable or mutually playable cards at that local peak
I really like how this card rewards aggressive lines of play, and how The Nuka-Cola Challenges trigger encourages diversifying your attacks on multiple opponents
When building, if the deck tries to automatically add both Psychic and Dark Energy, manually remove the Psychic Energy