Even a card like [card]Trostani, Selesnyas Voice[/card] that normally requires significant deck allocation to function is randomly turned on by Marath
What that means will vary from set to set
Consider, for example, Hearthborn Battler, Zoraline, Cosmos Caller, and Pond Prophet
$0.35 Arcum's Astrolabe Modern Horizons $0.79 Marit Lage's Slumber Modern Horizons $0.35 Glacial Revelation Modern Horizons $1.79 Rimefeather Owl Coldsnap $0.35 Frostwalk Bastion Modern Horizons $0.59 Icebreaker Kraken Kaldheim $0.35 Frost Augur Kaldheim $0.35 Rime Tender Modern Horizons $0.35 Icebind Pillar Kaldheim $0.35 Iceberg Cancrix Modern Horizons $0.35 Boreal Outrider Kaldheim $0.35 Winter's Rest Modern Horizons 0 results found
That will determine the power level of a fair number of cards you could well be playing in cube
The main thing from Mechanics is at the end: Theres going to be ten different Companions, cards that can exist outside of the game and can be cast from the Command zone as long as a condition is satisfied