Even in a game of Commander, thisll do a lot of damage very quickly, and there are lots of ways to use those exiled cards, like Oblivion Sower, for example
Unfortunately, those cards fall into Cool, but Inefficient: sure, its a neat Easter Egg, but keep in mind that not only the cards themselves are rather underwhelming when compare to the cards you get in regular packs, but this particular packs are dozens of times more expensive than regular packs Level-Up at Intimacy 5: Once you finish a partner's 2nd heart storyline, you can start editing their Deck to tailor their strategy to your Deck's
Harbinger of the Hunt, on the other hand, provides a very reasonable answer to a bunch of cards that will likely continue to be heavily played post-rotation
5: Add 1 "Super Polymerization" from your Deck to your hand
Lurrus is obviously a very good card, especially with Ghitu Lavarunner and Viashino Pyromancer, because it means you can get an effect immediately when you cast it
Today, the Black Kyurem EX SR card is a cornerstone for serious Black & White collectors, Gen V enthusiasts, or anyone assembling a full-art Legendary Dragon collection