Bilbo, Thief in the Night — ruling 1

To determine the total cost of a spell, start with the mana cost or alternative cost you're paying, add any cost increases, then apply any cost reductions (such as that of Bilbo, Thief in the Night). The mana value of the spell is determined only by its mana cost, no matter what the total cost to cast the spell was.

Bilbo, Thief in the Night — ruling 2

The cost reduction applies only to generic mana in the costs of spells you cast from anywhere other than your hand. It can't reduce requirements of a specific color of mana.

Bilbo, Thief in the Night — ruling 3

You can choose to cast an Adventure instant or sorcery spell from your graveyard as Bilbo's ability resolves. If that Adventure spell resolves, you can exile it using the replacement effect associated with the Adventure, and you can cast the permanent spell later from exile. If that Adventure spell fails to resolve (because it's countered or its targets become illegal), that card is exiled by the replacement effect created by Bilbo's ability; you can't cast the permanent spell later from exile.

Bilbo, Thief in the Night : règles, fonctionnement et interactions (MTG)

Bilbo, Thief in the Night is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Spells you cast from anywhere other than your hand cost less to cast. Whenever Bilbo attacks, you may cast an artifact, instant, or sorcery spell from your graveyard. If an instant or sorcery spell cast this way would be put into your graveyard, exile it instead.

Complete guide

Bilbo, Thief in the Night is a versatile Legendary Halfling Rogue that excels at utilizing resources from outside your hand. By reducing the cost of spells cast from zones like the graveyard or library, he provides significant tempo advantages throughout the game.

A Master of Utility

Bilbo has two distinct abilities. First, he acts as a cost reducer for any spell you cast from anywhere other than your hand, such as from your graveyard, exile, or the top of your library. Second, he possesses a triggered ability that occurs whenever he attacks, allowing you to cast an artifact, instant, or sorcery spell directly from your graveyard.

Resolving the Attack Trigger

When Bilbo attacks, his ability goes on the stack. As it resolves, you choose a valid artifact, instant, or sorcery card in your graveyard. You must pay all costs for the spell, but Bilbo's own reduction applies. If the spell is an instant or sorcery, a replacement effect is created: if that spell would go to the graveyard after resolving or being countered, it is exiled instead.

Cost Reduction Mechanics

To calculate the final cost of a spell, you start with the base mana cost or an alternative cost, add any increases, and finally apply reductions like Bilbo's. Note that this reduction only applies to generic mana. It cannot reduce colored mana requirements, and the mana value of the spell remains unchanged regardless of the discount.

When to Strike

Because Bilbo's ability triggers on attack, you want to ensure he can survive combat or that the value of the spell cast from the graveyard outweighs the risk of losing him. Use him to recur cheap artifacts or powerful sorceries that have already served their purpose once.

Interaction examples

Stacking Reductions

Foundry Inspector

Ornithopter of Paradise

If you have both Bilbo and Foundry Inspector on the battlefield and you attack with Bilbo, you can choose to cast Ornithopter of Paradise from your graveyard. Foundry Inspector reduces the artifact's cost by {1}, and Bilbo's static ability reduces it by another {1} because it is being cast from the graveyard. This makes the Ornithopter free to cast.

Managing the Graveyard

Suppose Bilbo attacks and you choose to cast a sorcery from your graveyard. You pay its cost (minus {1}). If your opponent casts a spell to counter your sorcery, Bilbo's replacement effect still applies. Instead of the sorcery returning to the graveyard, it is moved to the exile zone.

Guide written with AI from the official text and rulings. Official English text prevails.

How it works : Bilbo, Thief in the Night

Original English text — Wizards of the Coast / Scryfall

#1June 29, 2026· Wizards of the Coast
To determine the total cost of a spell, start with the mana cost or alternative cost you're paying, add any cost increases, then apply any cost reductions (such as that of Bilbo, Thief in the Night). The mana value of the spell is determined only by its mana cost, no matter what the total cost to cast the spell was.
No other card is named in this ruling.
#2June 29, 2026· Wizards of the Coast
The cost reduction applies only to generic mana in the costs of spells you cast from anywhere other than your hand. It can't reduce requirements of a specific color of mana.
No other card is named in this ruling.
#3June 29, 2026· Wizards of the Coast
You can choose to cast an Adventure instant or sorcery spell from your graveyard as Bilbo's ability resolves. If that Adventure spell resolves, you can exile it using the replacement effect associated with the Adventure, and you can cast the permanent spell later from exile. If that Adventure spell fails to resolve (because it's countered or its targets become illegal), that card is exiled by the replacement effect created by Bilbo's ability; you can't cast the permanent spell later from exile.
No other card is named in this ruling.