Bilbo, Thief in the Night

Riddles deliberately puts a pile of cards in your graveyard — with Bilbo, the 'lost' pile isn't lost at all: he casts those spells on later attacks.

Bilbo can cast Allure of Power from the graveyard when he attacks, reducing its mana cost by {1}; after the Adventure resolves, My Precious can be cast from exile and is also reduced by {1}, extracting both halves from a single graveyard card.

Speak Secrets puts four cards into the graveyard and only returns one instant or sorcery, leaving other milled artifacts or spells available for Bilbo to cast when he attacks.

When Bilbo attacks, he can cast Moment of Glory from the graveyard for its normal one-white-mana cost rather than its flashback cost; because it was cast from a graveyard, it still puts a counter on every creature you control before being exiled.

Bilbo can cast Tidings from the graveyard for its normal one-mana cost when he attacks; because it was cast from a graveyard, it amasses 3 rather than 1.

Bilbo reduces the flashback cost to {2}{U}, and his attack trigger can cast Plunder from the graveyard for its upgraded draw-two effect.

Equipping Bilbo makes his attack ability trigger an additional time, allowing you to cast two eligible cards from your graveyard on each attack instead of one.

Bilbo can cast Gleam of Death from the graveyard at a discount, mill six cards and recover the milled instants and sorceries, then also discount Glamdring when it is cast from exile.

When Bilbo and the Boat attack, you can resolve the Boat's recruit trigger first, discard an artifact, instant, or sorcery, and then immediately cast that card with Bilbo's attack trigger.

Bilbo reduces the cost of nonland spells exiled by Flameshape, and his attack ability lets you recast instants and sorceries from your graveyard to generate additional Gandalf triggers.

The Councillors' mill can target you, loading Bilbo's graveyard with castable spells while growing toward the 7-card graveyard bonus.

Bilbo lets you repeatedly cast instants and sorceries from your graveyard when he attacks, giving Bothersome Noisemaker additional noncreature-spell triggers without requiring fresh spells from hand.

After Take a Glance exiles this card, Bilbo, Thief in the Night reduces the creature half's cost from three mana to two, making the full value sequence much more efficient.

After Magnificent End trades for a creature, Bilbo can cast it again from the graveyard when he attacks. The attack step commonly provides a tapped opposing attacker or blocker, making the second casting inexpensive.

Cards exiled by The Great Goblin are cast from outside your hand, so Bilbo reduces the cost of eligible artifact, instant, and sorcery spells by {1}, making repeated death-trigger cards easier to use before their permission expires.

Its draw-two-and-discard mode can place another artifact, instant, or sorcery into the graveyard, while Confusticate itself remains available for Bilbo to cast again after resolving.

The Key can make Bilbo unblockable every turn, letting him attack safely and repeatedly generate value from graveyard spells.

The Map repeatedly draws and discards, placing artifacts, instants, and sorceries into the graveyard for Bilbo to cast while filtering away cards you do not need.

After Burglar's Plot resolves, Luckwearer is cast as a creature from exile, so Bilbo, Thief in the Night reduces that creature spell's cost by {1}.

After At the Door resolves, Bilbo reduces the cost of casting An Unexpected Party from exile by {1}, making it easier to deploy the anthem while continuing to develop the board.

After Gone Fishing resolves, Lake-town Mariners is cast from exile rather than from hand, so Bilbo reduces its creature-side cost from six mana to five.

Artifacts that Bilbo casts from the graveyard enter again and trigger Fateful Discovery, turning his artifact recursion into additional card draw.