These cards make a great addition to any deck, can be combined with other Pokmon, and use exciting abilities
Much like all these effects that rely on things entering and leaving play, or indeed the Bombardment that helps you have things leave play, you only want them in a very dedicated kind of deck
In practice, the answer is usually both
And in Dominaria United, that remains true with Timeless Lotus
If you'd prefer to pass your attackers around the table, generals like Karona, False God, Tahngarth, First Mate, Kharn the Betrayer, and Xantcha, Sleeper Agent will happily jump across the battlefield to attack on turns outside of your own
with the ability to make the whole game a clean slate for everyone involved by shuffling all cards from their discard pile back into their deck, is it any wonder