The Jarry Arcana is not a tarot, nor an oracle, nor a spell casting deck. While the deck of 34 cards (Alfred Jarry’s age when he died) may be used for divination or conjuration, it’s primary function is intended to be that of a generator of imaginary solutions. Actually, it is not really even a deck at all, but rather and example of “that which is comprised of cardboard rectangles” (in Jarry-speak).
Shuffle these rectangles, state your quandary, allow three (or possibly more) of the enigmatic objects to fall on the table (or floor) in a sort of line, then read the “communique” that emerges from the sequence. This pronouncement will inevitably point to your solution, as highly suspect as this might seem at first glance…an uncovering, which, invariably, will prove to be of profound use despite its alleged “imaginary” status.