| The World's Greatest FishermanSpeed Duel: Attack from the Deep · 01 | Speed Duel: Attack from the Deep | 01 | Ultra Rare | $0.75 |
| The World TreeCrossroads of Chaos · 059 | Crossroads of Chaos | 059 | Rare | €0.23 |
| The Zombie VampireBattle of Chaos · 045 | Battle of Chaos | 045 | Secret Rare | $0.37 |
| This Creepy Little PunkMaze of Memories · 018 | Maze of Memories | 018 | Rare | €0.04 |
| Thor, Lord of the AesirStorm of Ragnarok · 038 | Storm of Ragnarok | 038 | Ultra Rare | €0.12 |
| Thorn Fangs of Violet PoisonBattles of Legend: Glorious Gallery · 039 | Battles of Legend: Glorious Gallery | 039 | New | — |
| Thorn of MaliceRaging Battle · 047 | Raging Battle | 047 | Common | €0.05 |
| Thoroughbred ElfUnlisted Printings | Unlisted Printings | — | — | — |
| Thought Ruler ArchfiendThe Duelist Genesis · 044 | The Duelist Genesis | 044 | Ultra Rare | $1.46 |
| Thousand DragonMetal Raiders · 143 | Metal Raiders | 143 | Secret Rare | €0.02 |
| Thousand EnergyAncient Sanctuary · 097 | Ancient Sanctuary | 097 | Rare | €0.09 |
| Thousand-Eyes IdolPharaoh's Servant · 083 | Pharaoh's Servant | 083 | Short Print | €0.05 |
| Thousand-Eyes JellyfishTactical Evolution · 082 | Tactical Evolution | 082 | Rare | €0.18 |
| Thousand-Eyes RestrictPharaoh's Servant · 084 | Pharaoh's Servant | 084 | Ultra Rare | €1.00 |
| Thousand-Eyes SpellSpeed Duel Starter Decks: Match of the Millennium · 03 | Speed Duel Starter Decks: Match of the Millennium | 03 | Common | €0.22 |
| Thousand KnivesYu-Gi-Oh! Power of Chaos: Yugi the Destiny promotional cards · 003 | Yu-Gi-Oh! Power of Chaos: Yugi the Destiny promotional cards | 003 | Prismatic Secret Rare | €0.06 |
| Thousand NeedlesDark Crisis · 028 | Dark Crisis | 028 | Common | $0.10 |
| Thousand Umbral HorrorBeyond the Brave · 008 | Beyond the Brave | 008 | Super Rare | €0.06 |
| Threatening RoarFlaming Eternity · 052 | Flaming Eternity | 052 | Common | $0.01 |
| Three-Eyed GhostPhantom Nightmare · 097 | Phantom Nightmare | 097 | Common | €0.12 |
| Three-Headed GeedoPharaoh's Servant · 002 | Pharaoh's Servant | 002 | Common | €0.08 |
| Three in OneThe Infinite Forbidden · 080 | The Infinite Forbidden | 080 | Common | €0.09 |
| Three-Legged ZombiesMcDonald's Promotional Cards · 010 | McDonald's Promotional Cards | 010 | Common | $1.16 |
| Three of a KindReturn of the Duelist · 077 | Return of the Duelist | 077 | Common | $0.09 |
| Three Strikes BarrierCode of the Duelist · 067 | Code of the Duelist | 067 | Common | €0.02 |
| Three Thousand NeedlesReturn of the Duelist · 039 | Return of the Duelist | 039 | Short Print | $0.10 |
| Three Trolling TrollsFlames of Destruction · 030 | Flames of Destruction | 030 | Common | €0.03 |
| Threshold BorgBurst of Destiny · 095 | Burst of Destiny | 095 | Common | €0.02 |
| Throne of the ArchfiendsBurst Protocol · 059 | Burst Protocol | 059 | Common | €0.11 |
| Thron the Disciplined AngelLightning Overdrive · 082 | Lightning Overdrive | 082 | Super Rare | €0.07 |
| Throwstone UnitLegacy of Darkness · 017 | Legacy of Darkness | 017 | Common | €0.09 |
| Thunder BallBattles of Legend: Crystal Revenge · 004 | Battles of Legend: Crystal Revenge | 004 | Ultra Rare | €0.07 |
| Thunderclap MonkSavage Strike · 026 | Savage Strike | 026 | Super Rare | $0.20 |
| Thunderclap SkywolfSecrets of Eternity · 036 | Secrets of Eternity | 036 | Super Rare | $0.26 |
| Thunder CrashInvasion of Chaos · 043 | Invasion of Chaos | 043 | Common | €0.04 |
| Thundercrash SnarecrowChaos Origins · 084 | Chaos Origins | 084 | Common | €0.05 |
| Thunder DischargeThe Grand Creators · 035 | The Grand Creators | 035 | Rare | €0.04 |
| Thunder DragonMetal Raiders · 097 | Metal Raiders | 097 | Short Print | $1.37 |
| Thunder Dragon ColossusSoul Fusion · 037 | Soul Fusion | 037 | Secret Rare | $0.39 |
| Thunder DragondarkSoul Fusion · 019 | Soul Fusion | 019 | Ultra Rare | €0.15 |
| Thunder Dragon DischargeSoul Fusion · 073 | Soul Fusion | 073 | Rare | €0.10 |
| Thunder DragonduoSoul Fusion · 022 | Soul Fusion | 022 | Super Rare | $0.14 |
| Thunder Dragon FusionSoul Fusion · 060 | Soul Fusion | 060 | Ultra Rare | $1.16 |
| Thunder DragonhawkSoul Fusion · 020 | Soul Fusion | 020 | Ultra Rare | €0.13 |
| Thunder DragonlordEternity Code · 025 | Eternity Code | 025 | Common | €0.09 |
| Thunder DragonmatrixSoul Fusion · 018 | Soul Fusion | 018 | Rare | €0.16 |
| Thunder DragonroarSoul Fusion · 021 | Soul Fusion | 021 | Ultra Rare | €0.10 |
| Thunder Dragons' Hundred ThundersSoul Fusion · 072 | Soul Fusion | 072 | Rare | €0.09 |
| Thunder Dragon ThunderstormechDuel Power · 030 | Duel Power | 030 | Ultra Rare | €0.24 |
| Thunder Dragon TitanSoul Fusion · 036 | Soul Fusion | 036 | Secret Rare | €2.61 |