Marisi being a 5/4 for four mana is a solid rate, and with a big enough board, you can connect with every opponent, goading all their creatures
What makes Brainstorm so good is you draw three cards and put two cards that you don't want in your hand on top of your library
White life gain comes primarily in the flavor of either healing or lifelink, both of which are present in Foundations
Since Urborg, Tomb of Yawgmoth makes all lands into Swamps, so long as someone at the table has a copy in play, you can recur Bubbling Muck and untap lands as often as your cards will allow before casting a spell like Exsanguinate or Torment of Hailfire to win
It's a separate item given to local games stores to hand out to customers/players
I think a lot of the magic of Firion is lost as you ascend the brackets, in much the same way light flees the eyes of a Voltron player coming up against their third board wipe