The ultimate ability is really something too
Starmie ex is one of the strongest deck archetypes in Genetic Apex, but you need Staryu to evolve into Starmie ex
You can also do dumb things with Nevinyrral's Disk by pairing it with Darksteel Forge, saving your artifacts (including the Disk itself) from destruction so you can do it again and again
For playsets of competitive staples like Elesas Sparkle, Genesect V, or Mew VMAX (regular), buying singles is significantly cheaper than opening boxes
This pairs very nicely with the Boros Convoke strategy, which pays you off for having lots of creatures on the board that you can tap with the Convoke ability to pay for powerful red or white spells
Considering that these are the two most recent set releases as of the writing of this article, interest in this archetype for Commander purposes is understandable