Lay it face down and draw the top 7 cards
Understanding rarity and production is a huge step, but it's just one piece of the puzzle
Ashcoat of the Shadow Swarm Broken Visage Cutthroat il-Dal Dauthi Cutthroat Dauthi Embrace Dauthi Ghoul Dauthi Horror Dauthi Jackal Dauthi Marauder Dauthi Mercenary Dauthi Mindripper Dauthi Slayer Dauthi Trapper Dauthi Voidwalker Dauthi Voidwalker Dauthi Warlord Death's Shadow Dragon Shadow Embrose, Dean of Shadow Faceless Devourer Knight of Dusk's Shadow Misery's Shadow Nether Shadow Nether Traitor Nezumi Shadow-Watcher Perilous Shadow Shadow Guildmage Shadow Stinger Shadow, Mysterious Assassin Stronghold Overseer Stronghold Rats Traitor's Clutch Trespasser il-Vec Urborg Panther Vashta Nerada
Card value depends on rarity, condition, edition, age, grading status, and current collector demand
There are no fewer than three decks on sale for the set right now, but arguably the easiest recommendation is Food and Fellowship
Whenever one or more creatures you control enter, if one or more of them entered from a graveyard or was cast from a graveyard, put two +1/+1 counters on Kotis