mtg are commander cards legal in standard Magic Arena Exclusive (Legal MTGA standard) : r/magicTCG Top Ten Standard Legal Commanders

Here are a few options: Leave the physical card outside the game and use a labeled substitute card for while the card must remain hidden in your library or face down Sleeve your deck with fully opaque backs like Dragon Shield Matte sleeves

Kaheera, the Orphanguard Kalonian Behemoth Kethek, Crucible Goliath Kezzerdrix Kona, Rescue Beastie Krakilin Krosan Beast Krosan Cloudscraper Krosan Colossus Laccolith Titan Lightning Reaver Loot, Exuberant Explorer Lovestruck Beast Lumbering Battlement

Over in an Instant Thats all for this deck upgrade

The target of Rex Nebula's ability will become a Vehicle artifact until end of turn

Note that the Art team played into having a variety of different kinds of dogs, many on the cuter side

My instincts for how to build this deck lead me towards cards like Windfall and wheel effects, but if you're potentially going wide I think a little Coastal Piracy might fit in nicely too