Duplication Device 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
Whenever you crank this Contraption, until end of turn, target creature becomes a copy of any creature on the battlefield, except it's an artifact in addition to its other types.
Complete guide
Duplication Device is a powerful Contraption that allows you to transform one creature into another on the battlefield. By using the unique mechanics of the Contraption deck, you can manipulate the board state and turn your utility creatures into massive threats. As an artifact-based transformation, it offers a distinct silver-bordered flair to your combat steps.
Understanding the Crank Mechanic
Duplication Device functions through the sprocket system. At the beginning of your upkeep, you move the CRANK! counter to the next sprocket and choose whether to crank the Contraptions located there. When you crank Duplication Device, its triggered ability goes on the stack, allowing you to choose two targets: a creature you wish to change, and any creature on the battlefield to serve as the template. The effect lasts until the end of the turn.
Copying and Card Types
When the ability resolves, the first target creature becomes a copy of the second. This copy effect follows standard Magic rules for copying: it acquires the base power, toughness, and abilities of the template creature. Crucially, Duplication Device adds a modifier: the target creature becomes an artifact in addition to its other types. This is a continuous effect that remains active until the turn ends, even if the original template creature leaves the battlefield.
Strategy and Timing
Because this ability triggers during your upkeep, it is primarily used to set up your turn's combat or utility. You can turn a small token into a copy of the strongest creature on the board to prepare for an attack. Alternatively, you can use it to copy a creature with a powerful activated or triggered ability that you need to use during your main phase.
Interaction examples
SkullclampIf you have a 1/1 creature and use Duplication Device to turn it into a copy of a larger creature, it becomes an artifact. You can then use the 'Equip' ability of Skullclamp to attach it to this new artifact creature. Since the creature is now an artifact, it might interact with other cards that care about artifact counts or permanents, and if it dies while equipped, you will still draw two cards from Skullclamp.
Sol RingWhile Duplication Device requires two creatures to function, turning a creature into an artifact version of a powerful threat allows you to utilize mana from Sol Ring to pay for any activated abilities that the new copy might have acquired. If the creature you copied has an ability that costs mana, your Sol Ring can help fuel your newly 'duplicated' threat for the remainder of the turn.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Duplication Device
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
Contraptions are artifacts. Anything that interacts with artifacts will interact with Contraptions.
No other card is named in this ruling.
- #2· Wizards of the Coast
Contraptions aren't put into your main deck. They go into a separate deck called the Contraption deck.
No other card is named in this ruling.
- #3· Wizards of the Coast
In Constructed formats, a Contraption deck must have at least fifteen different Contraption cards and no more than one of each.
No other card is named in this ruling.
- #4· Wizards of the Coast
In Limited formats, a Contraption deck may include any number of Contraption cards in your card pool. You don't have to include every Contraption card you draft or open in sealed deck. In those formats, your Contraption deck may include duplicates.
No other card is named in this ruling.
- #5· Wizards of the Coast
In silver-bordered games using Contraptions, you have three sprockets, illustrated on the back of Contraption cards. At the start of the game, put a CRANK! counter on sprocket 3.
No other card is named in this ruling.
- #6· Wizards of the Coast
While Contraptions you control are on the battlefield, the Contraption deck is not, even if you are using it to signify the three sprockets.
No other card is named in this ruling.
- #7· Wizards of the Coast
If you or a permanent you control are instructed to assemble a Contraption, reveal the top card of your Contraption deck. Put it onto the battlefield on one of the three sprockets.
No other card is named in this ruling.
- #8· Wizards of the Coast
At the beginning of your upkeep, if you control any Contraptions, move the CRANK! counter to the next sprocket. You may then crank any number of Contraptions on that sprocket, causing their abilities to trigger. Cranking a Contraption is always optional.
No other card is named in this ruling.
- #9· Wizards of the Coast
If you crank multiple Contraptions, their abilities can be put onto the stack in any order. The ability put onto the stack will resolve first.
No other card is named in this ruling.
- #10· Wizards of the Coast
If a Contraption would leave the battlefield and go to any zone other than exile, it instead goes to the scrapyard, the Contraption deck's version of the graveyard. Things that affect the graveyard do not affect the scrapyard. You can exile Contraptions just fine.
No other card is named in this ruling.
- #11· Wizards of the Coast
If you or a permanent you control assembles a Contraption and your Contraption deck is empty, nothing happens. You don't lose the game.
No other card is named in this ruling.
- #12· Wizards of the Coast
Any Contraption that's on the battlefield and wasn't assembled immediately heads to the scrapyard. However, if it's a not an actual Contraption card (like Copy Artifact isn't), it goes to your graveyard as normal. Non-Contraption cards can't be in the scrapyard.
No other card is named in this ruling.
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Meta decks with Duplication Device
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