Each of the 57 legendary creatures in Commander Legends: Battle for Baldur's Gate 30 uncommons, 25 rares, and 2 mythic raresappears in the rulebook treatment, as well as a selection of other non-legendary cards
We already know thanks to Orcish Siegemaster that having lots of big dumb orcs is something the Hosts of Mordor loves, and Corsairs of Umbar makes sure there are both lots of big dumb orcs, but they get to rampage wherever they please
A significant portion of the Red cards are just Balduvian berserkers Rogue Skycaptain has a cool artwork of a knight riding a giant hawk, and the idea that he's a 'mercenary' is reflected by you needing to pay mana for 'wage counters', otherwise the Rogue Skycaptain switches sides
Queen Marchesa Queen Marchesa is a great Mardu creature for those multiplayer games
If there are any costs to have a creature attack, those costs won't apply to the tokens
Ally Allies are a cooperative tribe in Commander, known for their ability to grow stronger as more of them join the battlefield