As always, it's been a pleasure writing and investigating Magic cards and history, and I'll see you in the next one
Past Modern Horizons examples include Force of Negation, Wrenn and Six, Murktide Regent, or Grist, the Hungertide
It really comes down to whether or not you think its best to have an enabler or a payoff as your commander, since Szarekh mills you while Imotekh rewards you for getting stuff out of your graveyard once its milled
Sapphire ensures youre never short on ink, powering up your bigger plays, while Steel provides tough characters and combat tricks to protect your side of the board
An illustration from The Tale of Peter Rabbit, by Beatrix Potter
If you really want to protect your chaos plan, you can run unblockable creatures like Changeling Outcast, or enchantments like Bedlam