unicorn cards mtg Prized offering blessings to anyone they encounter. Unicorn - MTG Wiki

Or, for the meme factor, you could use the March of the Machine 'team up' creatures

However, this great card isnt particularly accessible, with its original printing in Morningtide and a reprint in Core Set 2019 its only significant printings

A Whole New World is a game changer against the popular Emerald Steel decks, letting you replenish your hand and continue your late-game strategy

Its not particularly unique apart from its color, but it was pretty groundbreaking when first printed

So having some combo synergies helps make the commanders work, especially with ETBs and graveyard effects as with Silas Renn, Seeker Adept

Any time you are able to trade off your Phoenix for a real creature out of your opponent (or at least a removal spell), youre gaining an advantage