Purchasing a starter deck allows you to jump into a game with a predetermined strategy and decklist
Players can purchase individual booster packs, which contain twelve random cards
Rikku, Resourceful Guardian I can't sing praises for Rikku, Resourceful Guardian enough because counters of all sorts fly around even in the games with decks that don't try to use a bunch of counters
If you lose the monarch ability, attacking with Aragorn helps you recover it
And since it has those symbols, it has the Five Color identity, which limits it in Commander, but it is very strong as a leader, and with every card to choose from that's been printed, this should dig pretty deeply into your options
One big part that helps here is the adventure cards count for spells for most things, while also giving you a higher density of creatures than you might otherwise have