Any card with storm in the flavor text suddenly gains access to one of Magics most broken mechanics, to give just one example
Because these cards are ultimately reprints, the hope was to have the abilities of a previous MTG card somewhat closely resemble that of the main character in question
We already play Firebrand Archer in EDH decks that buff damage, and some of those commanders are recent, like Ojer Axonil, Deepest Might / Temple of Power, Ob Nixilis, Captive Kingpin, Urabrask / The Great Work, Taii Wakeen, Perfect Shot, Judith, Carnage Connoisseur, and Imodane, the Pyrohammer
Osteomancer Adept allows you to cast creature spells from your graveyard but adds foraging as an additional cost
They have no effect while the companion is outside the game
Treasures are useful because they can accelerate your mana in a pinch, or you can use Magdas payoff effect to find expensive artifacts or Dragons to close the game with, opening up a cool token play pattern that is a breath of fresh air after years of Krenko and Purphoros, God of the Forge combo killing tables by generating a zillion goblins