Im hearing a lot of really cute combos that involve doing things like reanimating The Gitrog Monster to mill yourself in a Dredge deck
Hajar can be that Commander, and at such a cheap initial cost to play, means you have no qualms about dropping Blasphemous Act, Chain Reaction et al to clear the way for your legends to connect
We would recommend unlocking each deck just to get a feel for them and add them all to your collection, but if you want to jump straight into battles with real opponents, focus on the Black & White: Basic Blue, Red and Green decks as they give you a bunch of handy trainer cards for building your own deck
Last year, we reported on a company that you can pay to x-ray card packs, with other stories including a break in at a YouTuber's grading store and some graded prototype trading cards potentially being fake
Deck B is a mono-green deck
It gets complicated because of the different editions and versions, but well break it down as easily as possible