Creature - Illusion Bear Color tag templates(None) Platypus-Bear Defender When this creature enters, mill two cards
Plus, you get to align yourself with one other player which is sometimes better than granting the whole table an extra card
Slimefoot makes a Saproling for and deals 1 damage to each opponent while gaining you 1 life whenever they die
Hopefully, this wont be necessary, but its better to be safe than sorry.
Keruga, the Macrosage It's hard to imagine the upside of building a deck with no one or two-CMC cards, but if that's your jam I think it makes sense to add Keruga as your companion
Much like Phoebe, Head of S.N.E.A.K., X strikes me as the sort of card that can slot right into a flavorful U/B Commander deck without breaking the game too much