From the back of the box:
Let the power of illusion be your shield!
The Deck of Illusions is a tricky magic item that has helped more than one adventuring party out of a tough jam. Just tossing a card creates an instant ally, or at least the illusion of one!
Green Ronin's Deck of Illusions brings this wondrous item to life with 36 tarot-sized cards, with each fearsome threat marvelously illustrated. When you absolutely have to pull a red dragon or a frost giant out of your back pocket, reach for the Deck of Illusions.
This deck contains 36 cards: 35 with illustrations, one card with some rules and one card of advertising.