The most important thing that a creature-land can be is efficient, and while members of the new cycle in Adventures in the Forgotten Realms tend to have fairly steep activation costs, they do gain some points back for this by entering the battlefield untapped on the early turns of the game
Smee could make for an excellent companion for cards like Jim Hawkins, Honorable Pirate if you decided to try out an Amber/Steel deck
Right now, Brainstorm sees a great deal of play in Legacy, Pauper, and even Vintage thanks to providing excellent cheap card selection
These specialize in gathering more resources (lands) faster than your opponent to play stronger cards quickly, preventing them from being able to counterattack
It's worth touching on the difference between counterfeits and proxies
This might not be the set for you if you look to grow your collection