Every time you cast a creature, you draw a card and put a land into play, which essentially fuels itself, especially with cheap enter the battlefield creatures or mana dorks
It also makes it easier to take the Monarch back, which is not always the case
Its not difficult to exile three cards from your graveyard, although doing it on turn 2 can be tricky, but a 2-mana black instant that can answer threats is incredible if you can
However, these immersive cards are very rare, meaning it can be quite difficult to get them
Zirda, the Dawnwaker While Zirda, the Dawnwaker is on the battlefield, most of your cycling cards cost mana
I wouldnt really fault anyone for choosing either of these Commanders, as they are both incredibly powerful and highly synergistic with this decks gameplan