He plays on Yugi's sense of honor, knowing Yugi won't back down from a challenge even when the odds are stacked against him. Key Takeaways and "Anime Logic"
Before even reaching the island, he threw Yugi's Exodia cards into the ocean. [S1E4] Into the Hornet's Nest
He lures Yugi into a specialized forest arena where Insect monsters receive a massive "Field Power Boost". He plays on Yugi's sense of honor, knowing
Into the Hornet's Nest: Yugi’s First Trial on Duelist Kingdom [S1E4] Into the Hornet's Nest