The Thief lets you draw then discard a card when one of your creatures deals damage to an opponent or you draw three with a full party
The Eternal Wanderer operates in the 1v1 creature combat space and says my best samurai can beat your best creature, of course, creating samurai for free each turn is great too
Personally, I recommend picking up a few starter decks
Kaalia is a veteran of the competitive commander scene, so you can expect many players to have a game plan when she shows up - removal, removal, and removal
If this is the case for you, then buying a ton of packs is not the way
Even though Jason has solved the aggro problem, with cheap, recurrable attackers, today it remains harder than I'd like to build a solid B/U control deck without falling back on crutches like Grave Titan or Wurmcoil Engine