More than a deck of cards...
Oblique Strategies is a deck of cards created by musician Brian Eno and artist Peter Schmidt, designed to aid creativity by providing lateral thinking prompts or "strategies" to break creative blocks.
Random Draw each card is an unpredictable suggestion sparking new ideas in the user.
Ambiguity this encourages interpretation and adaptation to suit individual creative processes.
Use the Oblique Strategies whenever you feel the need to disrupt your usual thinking patterns, inject randomness or unpredictability into your creative process, or explore new possibilities.
Read more at Wikipedia