This card was printed in the following sets:

Card Name: Symbol Set Block
Karn Liberated New Phyrexia (Mythic Rare) New Phyrexia Scars of Mirrodin
Karn Liberated Modern Masters 2015 Edition (Mythic Rare) Modern Masters 2015 Edition General
Karn Liberated Ultimate Masters (Mythic Rare) Ultimate Masters Miscellaneous
Karn Liberated Ultimate Box Toppers (Special) Ultimate Box Toppers Miscellaneous
Karn Liberated Double Masters (Mythic Rare) Double Masters
Karn Liberated Double Masters (Mythic Rare) Double Masters

This card has restrictions in the following formats:

Format Legality
Modern Legal
Legacy Legal
Vintage Legal
Commander Legal
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!