I dont understand it at all
Back in The Brothers War, for example, we got the bottom-left corner of Myrel, Shield of Argive
Other pricey cards here include two copies of Thundering Falls, and four of Agathas Soul Cauldron, leading to a TCGPlayer price of $678.87
Cards like Atraxa, Grand Unifier, Tarmogoyf, Reconstruct History, and Nethergoyf increase in effectiveness the more card types you have access to, so including a few sorceries helps unlock these cards fullest potentials
If your power is all in these expensive finishers, then you need to treat your creature count like a resource and preserve as large a board as possible while ramping to these payoffs
The main commanders I see being popular this set are Hinata, Isshin, and Satsuki