Being able to put an extra counter on all of your permanents is great in and of itself, but consistently doing it every turn can make Atraxa very, very intimidating to play against
Jorn Snow leads my secret-Carth the Lion superfriends deck, and I have to say Jorn, God of Winter // Kaldring, the Rimestaff has proved to be one of my favorite commanders
Solemn Simulacrum has seen play throughout its many lifetimes in Standard, however, the last time it was printed it only saw play in fringe ramp decks
Mauhr, Uruk-hai Captain If you want to lean into the amass orcs ability from this set, Mauhr, Uruk-hai Captain could be a fun commander for you
That loop yields infinite life and infinite counters on the rest of your team Archangel Avacyn 5/297 Shadows over Innistrad, Mythic Rare The younger Avacyn plays a completely different game
Crew 2 (Tap any number of creatures you control with total power 2 or more: This Vehicle becomes an artifact creature until end of turn.) You may planeswalk at the time TARDIS's triggered ability resolves, not at the time you cast the next spell