Fortunately, Phyrexia is really good at artifact creatures, so you can use cards like Crawling Chorus, Skrelvs Hive, White Suns Twilight, Malcator, Purity Overseer
[Main] Delete 1 of your opponent's level 3 Digimon
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Weakness: Lightning (x2) Resistance: none Retreat: 1 #051 Palpitoad Water HP100 Stage 1 Evolves from Tympole [W][W] Rain Splash: 50 damage
You still have a command zone and a color identity based on your oathbreaker, same as Commander, but there are two differences that significantly impact the game
"Brionac, Dragon of the Ice Barrier": Currently no longer Forbidden because of its errata, it still is a good non-destruction removal of your opponents cards