How many cards are in Metazoo UFO?

Excuse me, could you please clarify for me? Are you referring to the number of trading cards that are included in the Metazoo UFO series? If so, I'm not immediately familiar with the exact count as it can vary depending on the specific product offering and edition. However, typically, trading card sets like these come with a predetermined number of cards per pack or box. The best way to find out the exact number would be to check the official product description or contact the manufacturer directly. Is there any specific aspect of the Metazoo UFO series that you're particularly interested in?