second gen pokemon cards PSA Set Registry: Collecting the 1999 Pokémon 1st Edition Gaming Card Base Set, the Series that Started It All List of Generation 2 Cards

If you manage to do so, Espeon will devolve all of your opponents Pokmon by one level, potentially knocking them out in the process if they have more damage counters than their new HP cap

(Along with any special relationships between them, like "all my Lightning Bolts are next to each other.) When someone riffle shuffles, the reason that works is because they can't keep track of exactly where the cards are going in each shuffle, so they end up ignorant of their final positions

This is particularly an issue for Vintage, Legacy, and Commander players

Blue is pretty good at finding artifacts, so I can see Unctus settling into a role in high power EDH pods