Unlike Yidaro, Godzilla, Primeval Champion does see some select Commander play
Against slower decks, many of those same cards put pressure on your opponent and surgically deprive them of their bombs, especially backed up by countermagic like Logic Knot and even Traumatic Visions
Pokemon TCG Pocket Alakazam deck The best Alakazam deck in Pokemon TCG Pocket uses Alakazam to take on opponents, and Hypno to put our opponents to sleep so that they, hopefully, don't attack us back
In a major shift from games like Pokemon and Magic: The Gathering, Digimon ties resources to a Memory meter, not specific cards, making for an experience thats far fairer and leads to less frustrating games, as its harder to get screwed over out of the gate
However, if we can equip them with an Assault Suit, itll become impossible to sacrifice the Master Breeder
For its ability, the X value will be 5 from Mirror of Fate, but that hardly even matters--even if X were 1, we just need to be able to find some card to put on the battlefield, which is exactly the missing transition that Vault of Whispers needed for its reuse