First introduced in the Throne Of Eldraine set, Magic The Gathering's Adventure mechanic is one of its strongest. Adventure cards are a mixture of an instant or sorcery and a creature or artifact, split into two spells on a single card. Card the Adventure spell, and they then exile themselves. For as long as they remain exiled, you can cast them as their 'main' half.
Adventure cards are very powerful, as they offer up a lot of versatility. After casting one as an instant or sorcery, keeping it in exile makes it much harder for the opponent to interact with it. Then, you can cast it as a creature or artifact later when the gamestate calls for it. With their return in Commander Legends: Battle For Baldur's Gate, here are the best Adventure cards.
10 Ghost Lantern
Ghost Lantern is a very useful Equipment card, as it's both cheap to cast and can start building advantage quickly. Its Adventure side lets you return a creature card from your graveyard to the battlefield. Afterward, it can be used as an Equipment that will give the equipped creature a +1/+1 counter whenever another creature you control dies.
Ghost Lantern is a fantastic card in Aristocrat decks, as they want to be sacrificing their creatures. This will trigger the artifact side multiple times a turn, and allow you to recycle a card from your graveyard you used to sacrifice.
9 Beanstalk Giant
Beanstalk Giant is a useful Adventure card in any deck that wants to be ramping up their land. Its Adventure half lets you search your library for any basic land card and put it onto the battlefield. While it costs the same amount of mana as something like Cultivate, which gives you an extra land in your hand as well, the creature side is what makes Beanstalk Giant worth it.
When it is on the battlefield, its power and toughness is equal to the number of lands you control. Beanstalk Giant costs seven mana to cast, meaning it will often come down with a hefty amount of power and toughness to make it a threat as soon as it hits the field, ande only gets stronger the longer it's in play.
8 Two-Handed Axe
Two-Handed Axe can make any creature swinging in for damage a threat, both with its Adventure and Equipment halves. For simply two mana, its instant side will give any creature double strike until the end of the turn. When its used as an Equipment, it doubles the power of the equipped creature when it attacks.
Two-Handed Axe is a fantastic include in Voltron decks that stack Equipment onto a single creature. It mixes well with other powerful Auras and Equipment, and can sometimes be enough to take someone out of the game with one swing.
7 Giant Killer
Giant Killer is a bit of a specific removal spell on its Adventure half. For three mana, it can destroy any creature with power four or greater. Its creature half is very easy to cast, only requiring one white mana to bring it out.
Once Giant Killer is on the field, it can quickly become a nuisance by tapping a powerful creature your opponent controls before they can attack with it. Giant Killer does have to tap itself to use this ability, but if you have ways to untap it, you can use Giant Killer to tap down your opponent's whole battlefield.
6 Monster Manual
Monster Manual is a fantastic way to cheat big mana creatures onto the field. By paying one mana generic mana and one green mana and tapping Monster Manual, you can put any creature card from your hand onto the battlefield. If you have ways to untap Monster Manual, you can repeat this effect multiple times per turn to flood the battlefield.
Its Adventure helps you to set up its artifact half, allowing you to mill five cards and return a creature card you milled to your hand. This can ensure you won't get a dead draw if you know the top of your library, and keeps Monster Manual safe in exile until you're ready to utilize it.
5 Murderous Rider
Murderous Rider is both a brilliant removal spell and creature in one. Its casting cost is the same for both the Adventure and creature halves, and its Adventure can be used to destroy any target creature or planeswalker. Its creature side is a simple 2/3 with lifelink, but will recycle itself to the bottom of your library when it dies.
This allows Murderous Rider to be used multiple times in a game, especially if you ever shuffle your library to make it more likely to draw again. You can hold up mana to destroy a creature during your opponent's end step, and then cast Murderous Rider when your turn comes around for a body on the battlefield.
4 Fae Of Wishes
Fae Of Wishes, as the name might imply, utilizes the 'wish' mechanic, which is the act of putting a card from your sideboard (or otherwise outside the game in more casual formats) into your hand. This effect is already useful, as it can be used to obtain a card you would need at any point in the game.
What makes Fae Of Wishes especially useful is that it can be brought back to your hand for just one generic mana and one blue mana. This allows you to use the Adventure side again, to continuously pull cards out from your sideboard that keep the game in your favor. However, 'wishing' does not work in Commander, where there is no 'outside the game' to pull cards from.
3 Brazen Borrower
Brazen Borrower is a staple tempo card in many decks that are running blue. For two mana, Brazen Borrower can be cast on its instant Adventure side to return any nonland permanent an opponent controls to its owner's hand. This helps you set back the opponent, removing a creature from the battlefield and forcing your opponent to recast it later on.
The creature side of Brazen Borrower can also be cast at instant speed using its flash ability, allowing you to cast it when no one else has any interaction up as a surprise blocker, or because you do not need your own mana up during the end step of an opponent's turn.
2 Lovestruck Beast
Lovestruck Beast is a staple card in aggressive green decks that want to hit the ground running early and swing in for a lot of damage as soon as the game starts. Its Adventure only costs one green mana, which will make a 1/1 token.
This is important, as the 5/5 Lovestruck Beast can only attack when you control a 1/1 creature. It can still block, though, and for only three mana, a 5/5 is fantastic. Many low-to-the-ground aggro decks run a lot of 1/1 creatures, ensuring that Lovestruck Beast will be able to attack much more often than not.
1 Bonecrusher Giant
Bonecrusher Giant is one of the faces of the Adventure mechanic, and is why it is considered such a good mechanic. For two mana, Bonecrusher Giant can use its Adventure half to do two damage to any target, and stops any damage being prevented that turn. Afterward, for only three mana it can be cast as a 4/3 creature. If it is ever targeted by a spell, Bonecrusher Giant will deal two damage to the controller of that spell.
This allows Bonecrusher Giant to do upwards of four damage just by itself, which in a 20-life format is almost a fourth of the starting life. It can be cast very early, allowing Bonecrusher Giant to start forcing blocks early unless the opponent wants to take a hefty amount of damage.