If you are playing Chaos Orb in the Old School format, the card's text is “{1}, {T}: Choose a nontoken permanent on the battlefield. If Chaos Orb is on the battlefield, flip Chaos Orb onto the battlefield from a height of at least one foot. If Chaos Orb turns over completely at least once during the flip, and lands resting on the chosen permanent, destroy that permanent. Then destroy Chaos Orb.”
Chaos Orb
Chaos Orb can only affect permanents. Cards that are in the game but not on the battlefield, such as those in the Library and Graveyard, can't be affected.
If you have sleeves on cards, they count as the cards.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Mark Tedin
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