Notably, Korvold will benefit from any Magic card type being sacrificed, not just Treasures, so the deck can also use sacrifice-related cards like Sakura-Tribe Elder
16 The Council Of Four What You Do, I Do One of the stranger commanders on this list, The Council of Four is a very passive commander, one that has you sitting back and letting your opponents do their own things while you incrementally accrue more and more value
Saga creatures do everything a normal saga does, and are affected by everything that affects a normal saga (from counter doublers to proliferation)
You can jump in and be playing Magic against a human opponent within a minute or so of launching the client, you can use any of several included pre-constructed decks for free, and I never had to wait more than a few seconds for a game
You can also just focus on a player, and many spells let you choose either yourself or an opponent like Blood Pact