This card was printed in the following sets:

Card Name: Symbol Set Block
Unflinching Courage Dragon's Maze (Uncommon) Dragon's Maze Return to Ravnica
Unflinching Courage Modern Masters 2017 Edition (Uncommon) Modern Masters 2017 Edition General
Unflinching Courage Battlebond (Uncommon) Battlebond Miscellaneous
Unflinching Courage Commander 2018 (Uncommon) Commander 2018 Miscellaneous

This card has restrictions in the following formats:

Format Legality
Pioneer Legal
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!