For example, The blue-white color pair in The Brothers War is all about soldiers, a creature type originally introduced and supported in Fallen Empires
Iroas, God of Victory is great for combat-heavy decks
The Wise Mothman makes everyone mill cards, triggering many synergies from cards like Syr Konrad, the Grim, while distributing +1/+1 counters around your creatures
Cards similar to Deepwood Wolverine include Folk of An-Havva, Elfse Berserker, Devoted Retainer
Putting in a few battles and figuring out which cards work well and which ones aren't very useful is the best way to hone your deck
The current seller had a similar experience, recounting the first time they saw a Black Lotus in person