march of the machine mtg commander decks Deck The Gathering cards and 1 Traditional Foil double March of the Machine Commander

Zootopia Police Headquarters is another option that works if you have Nick in hand

Maybe leave all the cards face up

Just keep Hexing Squelcher alive with some counterspells of your own, and make your opponents pay life for trying to deal with the lil guy

There's almost no downside, and putting a card like Ulamog, the Ceaseless Hunger or Karn Liberated underneath Ugin's Labyrinth via imprint only to pick it back up when casting it is easier adds a layer of versatility to the Tron strategy that will make it even more of a threat than it has been previously

Its a 3-color commander whereas Ulasht is only two, but some might argue thats actually a benefit

For decks looking for a specific 1-drop or land, Once Upon a Time is likely too powerful for what it does