My second turn is likely Opt, use Scalding Tarn, Serum Visions. Opt first, use that info to figure out what land I want on my fetch as the cost of reshuffling a bottomed scry is low,and then Serum Visions and get the maximum out of that scry
Ignite the Beacon Tutors that net two cards from your library tend to be pretty strong
Set symbols
Nowadays, youll still find effects like these, but reds mana acceleration has expanded to include the use of Treasures, which are artifact tokens you can tap and sacrifice to add a a mana of any color to your mana pool
Mocking Sprite: Way more at home in Alela, Cunning Conqueror control than anywhere else (which is literally where you can find one in the precon)
You can also abuse blink or reanimation loops to bring your Commander in repeatedly, thus drawing a ton of legends in a single turn