You can always activate an ability that instructs a creature to adapt
Plenty of other Commander precons have used one-off adventure cards before, though the mechanic would make total sense from the Final Fantasy perspective
The other decks that utilize the devotion mechanic can be strong as well, but they hinge on having access to Nykthos, Shrine to Nyx, whereas Mono-Blue Devotion doesnt need that card to go bananas
Feroz's Ban is the in-universe reason that Ulgortha is separated from the rest of the Multiverse, trapping Baron Sengir in the plane
That said, we kept it in mind and put a five-color identity Noctis on the FCA [Through the Ages] bonus sheet, as a reprint of Kenrith, the Returned King, so folks who wanted Noctis at the helm with his pals could still do that