Magical Hacker 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
: Change the text of target spell or permanent by replacing all instances of + with -, and vice versa, until end of turn.
Complete guide
Magical Hacker is one of the most unique cards from the Un-sets, allowing players to rewrite the fundamental math of the game. By swapping plus and minus signs, this Human Gamer turns common benefits into penalties and vice versa. It is a powerful tool for anyone looking to disrupt their opponent's strategy or supercharge their own abilities.
What It Does
Magical Hacker has an activated ability for one blue mana that targets a spell or a permanent. When this ability resolves, every instance of the '+' symbol in that target's text box is replaced with a '-' symbol, and every '-' is replaced with a '+'. This effect lasts until the end of the turn and can drastically change how abilities function.
How It Resolves Step by Step
First, you activate the ability by paying one blue mana and choosing a target, such as a permanent on the battlefield or a spell on the stack. Upon resolution, the game engine checks the text of the target for any plus or minus signs. It then performs a literal text replacement for the duration of the turn. This does not change the printed card, but it changes how the card is treated by the rules engine for all effects.
Common Mistakes
A frequent error is assuming Magical Hacker changes the symbols on counters already placed on a permanent; it only changes the text that creates or refers to them. Additionally, it does not change the power and toughness numbers themselves, only the modifiers in the text box. For example, a creature that says '+1/+1' becomes '-1/-1', but a creature that is simply a 2/2 remains a 2/2 unless it has an ability modified by the Hacker.
When to Play It
This card is best played when you can take advantage of powerful 'ultimate' abilities or when you need to weaken an opponent's cost-reduction effects. Since it can target spells on the stack, you can even use it reactively to turn a buff spell into a debuff before it resolves.
Interaction examples
Foundry InspectorIf you use Magical Hacker on your opponent's Foundry Inspector, its text changes from 'Artifact spells you cast cost {1} less to cast' to 'Artifact spells you cast cost {1} more to cast'. This effectively taxes your opponent instead of helping them.
Ornithopter of ParadiseIf an opponent plays a spell that gives a creature -2/-2, you can use Magical Hacker to target that spell while it is on the stack. The spell's text becomes +2/+2, and when it resolves, your Ornithopter of Paradise will grow larger instead of being destroyed.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Magical Hacker
Original English text — Wizards of the Coast / Scryfall
No additional ruling has been published for this card.
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Meta decks with Magical Hacker
No archived Top 8 deck with this card yet.