Diversion UnitDiversion Unit is good for attacking, blocking and stopping your opponents in their tracks
Cards already on the field are not affected (including face-down cards)
Practically every other white card was the level 7 Digimon that you already wanted to evolve into those being Omnimon in most cases
Chronomaly Artifact was a deck that seiged the OCG meta for quite some time, and by all means, you can bring back a little bit of that with a splash of Chronomaly in your pure-Artifacts
Barry, Cheren, Tierno, Hau, Hop, and Nemona (all rivals from their respective games) just draw 3 cards with no additional effect, while others have extra effects on top of the 3-card draw, such as Bird Keeper switching the player's active Pokmon
In part because making three extra mana for free in any deck is incredibly broken