Look, I understand the thrill of opening a booster pack and hoping to find something highly valuable
While doubtless there will be more 'Background' enchantments to pick from, the ones that intrigue me at the moment are Guild Artisan, which will give you piles of Treasure tokens to speed up your deck, and Criminal Past, which gives you access to black cards and makes your Karlach harder to deal with
Additionally, you should be thinking about whether you want to roll before or after combat
Partner (You can have two commanders if both have partner.) Legendary Creature - Human Rogue Sheoldred, Whispering One Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.) At the beginning of your upkeep, return target creature card from your graveyard to the battlefield
Many of those lands are looking for specific types of land for their ability to function, such as Cloudpost looking for 'Locus' and Lazotep Quarry looking for 'Desert'
Continuing with the High-End Reserved List we got: Six Sliver Queens (PL - NM), six Mox Diamonds (PO - NM), six Serra's Sanctum (GD - NM) and eight Grim Monoliths (LP - NM)