mtg arahbo roar of the world commander deck Arahbo, CAT TRIBAL Kaheera Companion Magic where X is its power. Commander MTG Deck Guide: Arahbo,

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

More importantly, though, it gives your auras a second chance by allowing you to cast them from the graveyard for a turn after they are put in

I could see the inclusion of one or two copies

What I'm saying is, this sphinx is good but it does take a hit from that extreme mana cost

The other mentions are basically any of the Gisa or Geralf iterations, all of which are easy includes in any deck that cares about having the best Zombies in Commander in it, because they make a lot of Zombies and have some excellent synergies