Seto 2nd

Fought after Labyrinth Mage (navigate maze: right, right, left, right). Seto is coerced by Heishin to fight Atem again, but secretly respects Atem's strength, noting that "the High Mages won't stand a chance against Atem." Must be fought after beating at least 2 high mages but BEFORE beating all 5 high mages — otherwise you are locked into the Final 7. Beating Seto 2nd removes Labyrinth Mage from the Final Gauntlet, reducing it to the Final 6.

Difficulty: Hard.

Threat Cards

• Gate Guardian (3750 ATK)
• Meteor B. Dragon (3500 ATK)
• Black Luster Soldier (3000 ATK in Moon)
• Metalzoa (3000 ATK in Moon)
• Blue-Eyes White Dragon (3000 ATK in Sun)

Strategy

Seto 2nd is the first duelist who can start with Gate Guardian and still be dangerous after it is destroyed. Besides GG, he plays Meteor B. Dragon, Metalzoa, Black Luster Soldier, and Blue-Eyes White Dragon. Play THTD in Pluto and try to make a 3800+ as fast as possible. If you lose, you must re-fight Labyrinth Mage. This is an incredibly punishing fight — prepare well.

Notable Drops

Farming

When defeated on S/A-POW rank, he can drop Twin-Headed Thunder Dragon and Zoa. His A-TEC pool is extraordinary — Raigeki, Crush Card, Dark Hole, Widespread Ruin, Bright Castle, and multiple equips. Worth considering A-TEC if you have a trap and can control the duel.

AI Behavior

Hand size of 18 cards. 25% attack probability on facedown cards. Cannot be easily faked out.

Card Pages

Related Duelists

The AI Behavior section displays the duelist's artificial intelligence parameters including Hand Size, Max Fusion Length, Spell Probability, Attack Probability, Low LP Threshold, Critical Deck Size, and the probability distribution for decision states under both Total Domination and Lacks Domination conditions. These values determine how aggressively or defensively the duelist plays during a match.

Some duelists have the Millennium Eye ability (Heishin, Pegasus, Heishin 2nd, Seto 3rd, DarkNite, Nitemare), allowing them to see your face-down cards. The field section shows the terrain bonus that affects certain monster types.

The swords icon next to the duelist's portrait starts a practice duel against this opponent. You can test strategies, practice farming techniques, or challenge yourself against any duelist in the game. The duel uses the duelist's actual deck, AI behavior, and field terrain.

The Deck & Drops section uses tabs to switch between viewing the duelist's Deck and their three drop pools: S,A POW, S,A TEC, and B,C,D POW/TEC. Each tab shows cards with their drop weight (out of 2048) and probability percentage.

Use the search bar to find specific cards by name, ID, type, or stats. Filter by guardian stars, card type (Monster, Magic, Equip, Trap, Ritual), or any custom group using the 'Filter by group' button.

The Simulate Drop tool lets you simulate winning a duel and seeing which cards you would receive. Select a rank (S,A POW, S,A TEC, or B,C,D), choose a quantity (1, 5, 15, or 30 drops), and click the Randomize button. Each drop is drawn from the duelist's weighted card pool, with higher-weight cards appearing more frequently.

The dropdown quantity selector multiplies the number of cards you receive from a single win — drop modes x5, x15, and x30 drastically reduce farming time compared to x1 drops.

The Turn 1 Play table shows the probability of each card the duelist can play on the first turn of a duel. The data is based on ~2 billion simulated duels per duelist, run by GMS and organized by Syura. This is not official game data but should be extremely accurate.

The bold 'This or Lower' column is the most useful metric — it shows the combined chance of the duelist starting with this card's stat or any lower stat. For example, if Kaiba has a 27% 'This or Lower' for 2000 ATK, that means there's a 27% chance he starts with 2000 ATK or less. This helps you understand how rare a particular start is.

The 'This Card %' column shows the individual probability for that specific card. The 'Same Stat %' column shows the combined chance for all cards with the same max stat. The '1 in X' column shows the rarity as '1 in X duels'.

Click column headers to sort the table. Data is not available for Duel Master K since he uses a copy of your own deck.

The Simulate Turn 1 tool randomly draws cards from the duelist's turn 1 distribution. Each card's probability of being drawn matches its 'This Card %' from the table above. Select a quantity (1, 5, 15, or 30 draws) and click the Randomize button to simulate that many starting hands.

This helps you understand what cards you're most likely to face on turn 1 when dueling this opponent. High-stat cards with larger percentages will appear more often in your simulations.