If you want to play a lot of basic lands, I seriously would suggest building a deck that only runs one or two colors
As with Scion of the Ur-Dragon, Scourge of the Thrones price was driven solely by Commander demand, explaining its high foil price
Early Game: You can Evoke it for (R)(R) to bolt a creature, or (G)(G) to fix your mana and stabilize your life total against aggro
This makes cards like Black Knight the perfect silver bullet against white decks, or you could use Devoted Caretaker to save your creatures from Murder and Lightning Bolt
This lets us optimize for early and impactful use of Winters ability, while still having plenty of room for unique gameplans across different builds something always appreciated for a precon Commander that will see a lot of play in the next few months
Its second ability, Legendary creatures you control get +1/+0, is also useful as it benefits 6 creatures in your 99 as well as Valgavoth