Brain Maggot 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
When this creature enters, target opponent reveals their hand and you choose a nonland card from it. Exile that card until this creature leaves the battlefield.
Complete guide
Brain Maggot is a disruptive Enchantment Creature that burrows into your opponent's thoughts to steal their best resources. By combining hand disruption with a relevant creature type, it serves as a dual threat in black-based aggressive and control decks. Understanding how its single triggered ability differs from older cards is key to mastering its timing.
What It Does
Brain Maggot features a single triggered ability that triggers when it enters the battlefield. You target an opponent, who must reveal their entire hand, allowing you to choose any nonland card to exile. This card remains hidden away for as long as Brain Maggot remains on the battlefield. Unlike older designs, this is one ability with a built-in duration rather than two separate triggers.
How It Resolves Step by Step
First, the ability is put onto the stack after Brain Maggot enters the battlefield. When it resolves, the targeted opponent reveals their hand. You choose a nonland card, and that card is exiled immediately. The game creates a continuous effect with a specific end time: 'until Brain Maggot leaves the battlefield.' As soon as Brain Maggot moves to any other zone, such as the graveyard or your hand, the exiled card returns to the opponent's hand instantly without using the stack.
Common Mistakes
The most common confusion involves removing Brain Maggot in response to its entry trigger. If Brain Maggot leaves the battlefield before the ability resolves, the opponent still reveals their hand, but no card is exiled at all. Additionally, players often think the return of the card can be responded to; it cannot. It happens immediately as a one-shot effect, even before state-based actions are checked.
When to Play It
Brain Maggot is most effective early in the game to strip away an opponent's key curve-filler or a piece of removal that would otherwise kill the Maggot itself. Because it is an enchantment, it also synergizes with 'constellation' mechanics or other effects that care about enchantments entering the battlefield.
Interaction examples
Ornithopter of ParadiseYou cast Brain Maggot. Upon entry, its ability triggers targeting your opponent. They reveal their hand containing Ornithopter of Paradise and two lands. You choose the Ornithopter of Paradise, and it is exiled. Your opponent now lacks their mana-fixing creature until they find a way to remove Brain Maggot.
Blood ArtistYou have Blood Artist on the battlefield and cast Brain Maggot, exiling a card from your opponent's hand. Later, your opponent casts a spell to destroy Brain Maggot. As soon as Brain Maggot dies, two things happen: the exiled card returns to the opponent's hand immediately, and Blood Artist's ability triggers, allowing you to drain 1 life from your opponent.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Brain Maggot
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
Brain Maggot's ability causes a zone change with a duration, a new style of ability that's somewhat reminiscent of older cards like Tidehollow Sculler. However, unlike Tidehollow Sculler, Brain Maggot has a single ability that creates two one-shot effects: one that exiles the nonland card when the ability resolves, and another that returns the exiled card to its owner's hand immediately after Brain Maggot leaves the battlefield.
No other card is named in this ruling.
- #2· Wizards of the Coast
If Brain Maggot leaves the battlefield before its enters-the-battlefield ability resolves, the opponent will reveal their hand, but no card will be exiled.
No other card is named in this ruling.
- #3· Wizards of the Coast
The exiled card returns to its owner's hand immediately after Brain Maggot leaves the battlefield. Nothing happens between the two events, including state-based actions.
No other card is named in this ruling.
- #4· Wizards of the Coast
In a multiplayer game, if Brain Maggot's owner leaves the game, the exiled card will return to its owner's hand. Because the one-shot effect that returns the card isn't an ability that goes on the stack, it won't cease to exist along with the leaving player's spells and abilities on the stack.
No other card is named in this ruling.
Legal formats
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Meta decks with Brain Maggot
No archived Top 8 deck with this card yet.