This card was printed in the following sets:

Card Name: Symbol Set Block
Chaos Orb Limited Edition Alpha (Rare) Limited Edition Alpha Core Sets
Chaos Orb Limited Edition Beta (Rare) Limited Edition Beta Core Sets
Chaos Orb Unlimited Edition (Rare) Unlimited Edition Core Sets

This card has restrictions in the following formats:

Format Legality
Legacy Banned
Vintage Banned
Commander Banned
x For more information regarding each format and play style modifications, visit the Banned / Restricted Lists for DCI-Sanctioned Tournaments page on the Magic: The Gathering website.

Gatherer works better in the Companion app!