Starting at 5th level, you can summon the fighting spirit of your ancestors, entering a trancelike state called Warsong, provided you aren’t wearing heavy armor or a shield. It imbues you with supernatural speed, focus and fury.
You can initiate Warsong as a bonus action, which lasts for 1 minute. It ends if you are incapacitated, or if you don heavy armor or a shield. You can also dismiss Warsong any time you choose (no action required). While your Warsong is active you gain the following benefits:

Your gain a bonus to your AC equal to your Charisma modifier (minimum of +1).
Your walking speed increases by 10 feet.
You gain a bonus to any Constitution saving throws you make to maintain concentration on a spell. The bonus you gain equals your Charisma modifier (minimum of +1).

You can use this feature a number of times equal to your proficiency bonus. You regain all expended uses when you finish a long rest.