Exceptional Training is a Beast Master Ranger passive feature that enhances your companion. They can now take several common actions as bonus actions.
Description
Your summoned companions can now Dash, Disengage, and Help as a 
Bonus action.
How to learn
Classes:
- Class level 7: Beast Master
Used by creatures: Aranea Major, Corvus Celer, Corvus Major, Funglesby, Lupus Major, Lupus Optumus, Sharran Spider, Sharran Wolf, Ursa Ingens, Ursa Major, Verres Calamitosus, and Verres Major