The 39 Clues Wiki
The 39 Clues Wiki
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Card Combos are combinations of cards that can unlock a clue. There are a total of 40.

  • 11 cards are from Cahill card packs from the books. These are further discussed on their book articles.
  • 10 more card combos unlock a clue that can also be unlocked through missions.
  • 19 card combos that are the only way to unlock certain Clues.

Book Card Combos[]

The Maze of Bones Card Combo[]

One False Note Card Combo[]

Card 17: E-mail Code

Card 18: Amy Cahill

Card 19: Monument Valley

Card 20: Racco Mansion

Card 21: Lan Nguyen

Card 22: Rocketboard

The Sword Thief Card Combo []

Beyond the Grave Card Combo[]


The Black Circle Card Combo[]


In Too Deep Card Combo[]

The Viper's Nest Card Combo[]

The Emperor's Code Card Combo[]

Storm Warning Card Combo[]

Into the Gauntlet Card Combo[]

Vespers Rising Card Combo[]

Mission Card Combos[]

Mission 0: Agent Training Card Combo Both this combo and Mission 0 unlock Uranium.



Mission 1: The Lost Clue Card Combo[]

Both this combo and Mission 1 unlock Phosphorus.



Mission 2: The Emperor's Secret Card Combo[]

Both this combo and Mission 2 unlock King Cobra Venom.



Mission 3: The Lost Diamond Card Combo[]

Both this combo and Mission 3 unlock Zinc.



Mission 4: The Lucian Fort Card Combo[]

Both this combo and Mission 4 unlock Clover.



Mission 5: The General's Clue Card Combo[]

Both this combo and Mission 5 unlock Lead.



Mission 6: The Mad Scientist's Clue Card Combo[]

Both this combo and Mission 6 unlock Mercury.



Mission 7: The Frozen Secret Card Combo[]

Both this combo and Mission 7 unlock Magnesium.



Mission 8: The Desert Sabotage Card Combo[]

Both this combo and Mission 8 unlock Silver.



Mission 9: The Cliffhanger Clue Card Combo[]

Both this combo and Mission 9: The Cliffhanger Clue unlock Mint.


Other Card Combos[]

The Founding Fathers Card Combo[]

This combo unlocks Honey.


Cahill Collision Card Combo[]

This combo unlocks Hydrogen.



Madrigal Temple Card Combo[]

This combo unlocks Pepper.



The Wild West Card Combo[]

This combo unlocks Wormwood.


The Madrigal Stronghold Card Combo[]

This combo unlocks Barley.



The Ocean Secret Card Combo[]

This combo unlocks Quartz.



The X-Ray Clue Card Combo[]

This combo unlocks Copper.



Buried Secrets Card Combo[]

This combo unlocks Vinegar.



Frankenstein's Secret Card Combo[]

This combo unlocks Iodine.



The Missing Explorer Card Combo[]

This combo unlocks Bone.



New York Subway Card Combo[]

This combo unlocks Rosemary.



Turkish Delight Card Combo/ Hagia Sophia Card Combo[]

This combo unlocks Sulfur.



The Desert Mystery Card Combo[]

This combo unlocks Calcium Carbonate.


The Stolen Clue Card Combo[]

This combo unlocks Salt.



The Mountain Challenge Card Combo/The Inca Clue Card Combo[]

This combo unlocks Cocoa.



The Mad King Card Combo[]

This combo unlocks Pearl.



Eiffel's Secret Card Combo[]

This combo unlocks Blood.



The National Palace Card Combo[]

This combo unlocks Platinum.


Sandstone City Card Combo[]

This combo unlocks Lily.