These are all judged for printing paper proxies meant to get sleeved alongside a regular Magic card
As always, it's been a pleasure writing and investigating Magic cards and history, and I'll see you in the next one
They can be tapped for colorless mana that can be spent on anything except casting a nonartifact spell.
Past Modern Horizons examples include Force of Negation, Wrenn and Six, Murktide Regent, or Grist, the Hungertide
If you really want to protect your chaos plan, you can run unblockable creatures like Changeling Outcast, or enchantments like Bedlam
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