7-cost EustassCaptainKid, 3-cost Roronoa Zoro, 4-cost Trafalgar Law, and 1-cost Nami are the strongest cards in this starter deck, but they can be picked up in other boxes, so you arent forced to buy the ST10 to collect them
Creature and tribal search: Some black tutor cards specifically allow you to search for creatures, or creatures from specific tribes such as zombie cards, making them an excellent choice for decks that rely heavily on creature-based strategies

Release date: 1995-04-01 Abomination Air Elemental Alabaster Potion Aladdin's Lamp Aladdin's Ring Ali Baba Amrou Kithkin Amulet of Kroog Angry Mob Animate Artifact Animate Dead Animate Wall Ankh of Mishra Apprentice Wizard Armageddon Armageddon Clock Ashes to Ashes Ashnod's Battle Gear Aspect of Wolf Backfire Bad Moon Balance Ball Lightning Battering Ram Benalish Hero Bird Maiden Birds of Paradise Black Knight Black Mana Battery Black Vise Black Ward Blessing Blight Blood Lust Blue Elemental Blast Blue Mana Battery Blue Ward Bog Imp Bog Wraith Bottle of Suleiman Brainwash Brass Man Bronze Tablet Brothers of Fire Burrowing Carnivorous Plant Carrion Ants Castle Cave People Celestial Prism Channel Chaoslace Circle of Protection: Artifacts Circle of Protection: Black Circle of Protection: Blue Circle of Protection: Green Circle of Protection: Red Circle of Protection: White Clay Statue Clockwork Avian Clockwork Beast Cockatrice Colossus of Sardia Conservator Control Magic Conversion Coral Helm Cosmic Horror Counterspell Craw Wurm Creature Bond Crimson Manticore

I've been giving you examples from your own deck, and internal synergies
Can You Station with More than One Creature
Drawing a few bonus cards over the course of the game goes a long way toward making sure you win those attrition and resource wars