Arsène Lupin: an opponent's library becomes your opportunity

Arsène Lupin, Gentleman Thief leads a Dimir (blue/black) Commander deck rooted in the literary gentleman thief and his circle of aliases, accomplices and pursuers. When Lupin attacks, you burgle a target opponent's library: exile cards from the top until you exile a nonland card. You may cast that card for as long as it remains exiled, spending mana of any type to do so. The theft creates options; choosing when to use them drives the deck.

• BURGLE: Exile cards from a target opponent's library until you exile a nonland card. You may cast that card while it remains exiled, using mana of any type to pay for it.
• THE GENTLEMAN THIEF: Arsène Lupin, Gentleman Thief has menace and ward for two mana. He burgles on attack and draws a card when you cast a spell you do not own, at most once each turn.
• THE ACCOMPLICES: Grognard, Lupin's Right Hand makes each opponent lose 1 life and gains you 1 life whenever you cast a spell you do not own. Victoire, Lupin's Old Nurse creates a 1/1 blue and black Human Rogue Accomplice for the same event.
• USE THE OPENING: Inspector Ganimard, of the Sûreté taps a target opposing creature when you cast a spell you do not own and keeps it tapped through its controller's next untap step. Clarisse d'Étigues, First Love reduces those spells' costs by one generic mana.

The theft is only the first part of the plan

Burgle grants access to the exiled nonland card; it does not make that spell free or remove its normal timing requirements. You can leave it available until a useful window appears, then use its own effect alongside your cast-triggered rewards. Lupin's draw is limited to once each turn, while the listed abilities of Grognard and Victoire reward each qualifying spell. That makes both the spell and the turn you choose relevant.

The Duke of Charmerace copies instant and sorcery spells you cast that you do not own, while Prince Paul Sernine, Alias of Lupin burgles twice on entry. This Arsène Lupin Magic Proxy deck is for players who enjoy improvising with opponents' cards and building a support network around those casts. Its Belle Époque literary identity belongs to Lupin himself, with the named detectives and accomplices woven into the mechanics.

A 100-card Commander deck plus 3 tokens, with the existing Bracket 4 designation.