WotCs decisions for game balance heavily influence the secondary market and card values
Zenith has flexible casting, while Phalanx is fixed at 7cmc
Is the art cropped in a way that looks intentional (not oops, I chopped off the characters face)
That's the story for Adventures in the Forgotten Realms products, but there's morelearn all the details on Booster Fun, including Adventures in the Forgotten Realms rulebook, module, and borderless card treatments, and check out where to collect them all!
They were a great way to bring newer players into Magic and not overwhelm them with keywords, complex mechanics or strategy
I got in on some of the Dragons that are serialized a couple years ago, and they are up 50-500%