I’ve been tinkering around with this pile of fun.
So far, Commandeer is good for opposing Planeswalkers, Counterspell wars, and drawing three cards off my opponent’s Ancestral Recall. Chain is hit or miss. Sometimes it wins you the game, sometimes they bounce your lock piece. Daze is hilarious. Making them play around it means you can often board at least some out in game two. Submerge is great. Activate in response to a fetch land and shuffle away a Goyf/DRS. Archmage steals DRS.
Adding white gives us Teferi (CMC 3) and Teferi (CMC 5), Swords to Plowshares. Supreme Judgment keeps coming up on my wishlist, too, so there’s that. No Back to Basics means we can run Tundras and Library, and Heliod, if we want it, allows us to recur Seal of Cleansing.