That means she reduces any damage being dealt to her by 1 point per Knight you have on your side, which surely means were going to see some Knight-focused decks in the meta, taking advantage of this excellent ability
Realistically, youve got two different avenues to go down, and either one has a lot of potential
Genius Reinvented is the Emerald/Sapphire deck
You can even mulligan more greedily, as a one or two card deficit matters less over longer games with more draw steps
While reprints are expected as soon as July, and should continue for a while given the Final Fantasy expansion is part of MTGs standard set of cards (and thus legal in all tournament play), the difficulty of not only finding cards at the moment, but actually being able to afford them, has been a bit of a buzzkill.
Secondly, theres the limited number of them