best booster box to buy one piece total 6 kinds. One Piece Card Game TCG

The other mention here is one that is powerful in basically any deck: The One Ring

Mesmeric Orb is wonderful, since players will be tapping lands and creatures when they attack

Full Decklist 4 Forest 4 Island 4 Plains Adarkar Wastes An Offer You Can't Refuse Arcane Signet Baird, Steward of Argive Bloodroot Apothecary Body of Knowledge Broken Wings Brushland Canopy Vista Chasm Skulker Coiling Oracle Command Tower Communal Brewing Coveted Jewel Cultivate Evolving Wilds Exotic Orchard Faeburrow Elder Farseek Fellwar Stone Fisher's Talent Flooded Grove Forgotten Ancient Generous Gift Ghirapur Orrery Glacial Fortress Hinterland Harbor Hoofprints of the Stag Illusionist's Gambit Intellectual Offering Jolly Gerbils Jolrael, Mwonvuli Recluse Kalonian Hydra Kwain, Itinerant Meddler Long River's Pull Loran of the Third Path Managorger Hydra Mangara, the Diplomat Martial Impetus Mind Stone Octomancer Overflowing Basin Peerless Recycling Perch Protection Perplexing Test Prairie Stream Promise of Loyalty Psychosis Crawler Razorverge Thicket Realm-Cloaked Giant Reliquary Tower Riot Control Rishkar, Peema Renegade Rites of Flourishing Seachrome Coast Seaside Citadel Secret Rendezvous Selvala, Explorer Returned Simic Ascendancy Skycloud Expanse Sol Ring Sphinx of Enlightenment Spore Frog Steelburr Champion Sungrass Prairie Sunpetal Grove Sunscorch Regent Swiftfoot Boots Swords to Plowshares Tamiyo, Field Researcher Temple of Enlightenment Temple of Mystery Temple of Plenty Tempt with Bunnies Tempt with Discovery Tenuous Truce Terramorphic Expanse Thought Vessel Thriving Grove Thriving Heath Thriving Isle Triskaidekaphile Twenty-Toed Toad Wear Down Wizard Class Yavimaya Coast Family Matters A red/blue/white deck not caring about prowess and spellslinging

its not a comprehensive list, since there are easily 25 more and 25 more after that (and maybe even 25 more after those)