This is one of the key cards for shrine decks, since it produces board presence, and provides enough chump blockers to keep you alive while you deploy other shrines
The biggest thing Boromir has going for him is the fact that numerous Commander decks love to play spells without having to actually pay for them, and these types of effects come across numerous colors in the game, with cards like Gix and Etali getting absolutely shut down by Boromir
You can only take four moves into battle with you, though, and there's a handy spot in the bag menu which allows you to change your Pokmon moves at any time while you're out and about in the wild
One that has grabbed my attention is Ratonhnhakton due to it being a nifty Equipment Matters-commander in Esper colors
And I loathe spoiler season in equal measure
Look to combine Chapter 2 with evasion-granting cards like Dragoon's Lance for cheese