You're thinking it's just Act of Treason, but pay attention to the fact that this ability is not until end of turn, making it more like a repeatable Agent of Treachery
A new instance of Valki won't have access to the creatures another instance of Valki exiled, so that's going to complicate any plans we have to use both sides of this card at the same time
5 Pikachu 227: Sword & Shield Promos (Promo) Market Price: $350.46 This gorgeous card is a bit of an odd one when it comes to collecting, even for a Pokemon card
Best Replay Land Effects Payoffs Landfall decks benefit greatly from these kinds of effects, largely because they let you replay fetch lands to double trigger busted cards like Scute Swarm, Lotus Cobra, and Aesi, Tyrant of Gyre Strait
Luckily, you don't have to worry about paying sky-high prices if you're not at all bothered by the condition
The more control and stall cards you have the better these are as well simply due to increased chance of getting to cast them
