One of the first things that caught my eye was the Signature Trainer Cards - Supporter Cards signed by the trainers and gym leaders they feature
I love Hofri Ghostforge, not just because he does awesome things like make your Spirits get haste and trample, not just because he enables all sorts of extra value shenanigans, but because hes a Commander in a tribe and color combination that hasnt had a lot of direct support
Research historical sales, conduct population checks, and evaluate collector interest
Selesnya decks are not short on tools for their players, and usually establish a game plan through powerful nonland permanents
Vren, the Relentless Vren, the Relentless is the only Rat among Bloomburrows Raised Foil collection making them somewhat special
Ive checked out Watermelons blog, and it looks like it has a good database that ranks all the cards legal in the Hall of Fame format, although it would seem that the blog is taking all old back formats into account when ranking cards