The reward for winning is a new location on the map (in the bottom-right), which consists of a room in which you can talk to (and duel) Yami, Pegasus, Seto, Shadi, Simon Muran, Bakura (!), Noa (!!) and the Marik-controlled version of Jounouchi (from Battle City)
Forget that Yugi person
Using narrow slits in their design
Spell The Grand Spellbook Tower Field Spell Once per turn, during your Standby Phase, if you have a Spellcaster-Type monster on your side of the field or in your Graveyard: You can place 1 "Spellbook" Spell Card from your Graveyard on the bottom of your Deck, except "The Grand Spellbook Tower", then draw 1 card
Sagas and legendaries aside, there's a gazillion artifacts to make Jhoira click as one of Izzet's best competitive commanders, and one of Magic's best artifact commanders