This card was printed in the following sets:

Card Name: Symbol Set Block
Ambassador Oak Morningtide (Common) Morningtide Lorwyn Block
Ambassador Oak Duel Decks: Mind vs. Might (Common) Duel Decks: Mind vs. Might Miscellaneous
Ambassador Oak Masters 25 (Common) Masters 25 Miscellaneous
Ambassador Oak Jumpstart (Common) Jumpstart

This card has restrictions in the following formats:

Format Legality
Modern Legal
Legacy Legal
Vintage Legal
Commander Legal
Pauper 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!