Some cards show little poker suits and values, then an equal sign and then their effects.
The player using such a card must “draw!” - he has to flip over the top card of the deck, discard it, and look at the poker symbol in the lower left corner.
If this flipped card shows a symbol (and value!) that matches, then the “draw!” was successful, and the effect of the card is resolved (the “draw!” card is always discarded without effect). Otherwise, nothing happens: bad luck!
If a specific card value or range is specified on the card, then the “draw!” card must show a value within that range (including the pictured symbols), and the suit shown. The value sequence is: 2-3-4-5-6-7-8-9-10-J-Q-K-A.