When attacking, if you return 1 card from your opponent's trash to the bottom of their deck, you can delete all of your opponent's Digimon that share a name with the returned card
Oh, and its other power is the most broken ability in the entire game
Tapu Koko was, originally, one of the guardian deity Pokmon from the region of Alola and, with the release of Paradox Rift, it has been allowed to return to the spotlight as a new ex card
Ideally, Wizards of the Coast wont need to change anything as nothing will be too broken
Understand the Lost Zone mechanic and build a deck that can score you wins in the Expanded format
Usually it comes down to whoever can utilize an especially potent action at the right time such as the Dragon Fire action that banishes one character on the spot to give them the momentum they need to win the game