This card was printed in the following sets:

Card Name: Symbol Set Block
Arbiter of Knollridge Lorwyn (Rare) Lorwyn Lorwyn Block
Arbiter of Knollridge Magic: The Gathering-Commander (Rare) Magic: The Gathering-Commander Miscellaneous
Arbiter of Knollridge Commander 2015 (Rare) Commander 2015 General
Arbiter of Knollridge Commander Anthology 2018 (Rare) Commander Anthology 2018 Miscellaneous

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!