This year, the cycle of four Sagas in Universes Beyond: Warhammer 40,000 Commander Decks
This doesnt make them unplayable, but it does mean that they are only going to provide specific or supplemental support at best
Midnight Snack I like raid as an easy trigger and the one-time Sanguine Bond is a legit win con
If you havent tried Jeskas Will yet, then give it a go
Drawing 6, 9, or even 12 extra cards by turn 3 or 4 allowed Blue to simply overwhelm opponents with resources
Second, some of the cheap mythics (like Prossh, Skyraider of Kher) are actually pretty valuable in foil, since Masters 25 is their first foil printing and the primary demand for these cards is from Commander, and Commander players love their foils