Brainsurge 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
Draw four cards, then put two cards from your hand on top of your library in any order.
Complete guide
Brainsurge is a powerful addition to the blue mage's toolkit, offering significant card selection at instant speed. It functions as a modern evolution of the classic Brainstorm, allowing you to dig deep into your library for answers while setting up your future draws. Understanding the timing and sequence of this spell is crucial for maximizing your tactical advantage.
What It Does
Brainsurge is a 3-mana instant that allows you to draw four cards and then return two cards from your hand to the top of your library. This provides a net gain of one card in hand while allowing you to filter through four new options. The cards you put back do not have to be the ones you just drew; you can choose any two cards currently in your hand to place on top in any order.
Resolving Brainsurge Step by Step
When Brainsurge resolves, the following sequence occurs: First, you draw four cards from your library. Second, you look at your entire hand, which now includes the cards you previously held plus the four new ones. Third, you choose any two cards from your hand. Finally, you place those two cards on top of your library in the order of your choice. No player can take actions between the drawing and the putting back.
Common Mistakes
A frequent error is forgetting that Brainsurge must resolve fully once it begins. You cannot draw the cards, cast one of them, and then put two back. Another mistake involves card counts; if you have zero cards in hand and cast Brainsurge, you will draw four and then must put two back, leaving you with two cards. You cannot skip the 'put two cards back' instruction even if you want to keep all four.
Strategic Timing
Because Brainsurge is an instant, it is best used at the end of an opponent's turn to maximize your mana usage. It is also an excellent response to forced discard effects. If an opponent tries to make you discard your best spells, you can cast Brainsurge to hide those precious cards safely on top of your library where they cannot be touched.
Interaction examples
CounterspellYour opponent casts a spell you must stop, but you have Counterspell in hand and fear a discard spell might take it away. Alternatively, if you draw Counterspell during Brainsurge's resolution, you can choose to keep it in hand while putting two less relevant cards on top of your library, ensuring you have the protection ready for the next turn.
Arcane DenialIf an opponent attempts to counter your Brainsurge with Arcane Denial, Brainsurge will be moved to the graveyard without any cards being drawn or put back. However, if Brainsurge resolves, and you later cast Arcane Denial on another spell, you can use the knowledge gained from Brainsurge to decide whether you want to draw the specific cards you placed on top of your library during the next upkeep.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Brainsurge
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
The two cards you put on top of your library can be from the four you just drew or ones that were already in your hand.
No other card is named in this ruling.
Legal formats
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Meta decks with Brainsurge
No archived Top 8 deck with this card yet.