Desperate

When under 30% hp (round up), have advantage on attack, damage, dodge, and defense rolls. Also a +10 to movement (if your us the Disengage action).

When under the influence of Bardic Inspiration, roll 2d6 and take the higher roll (AKA advantage on Bardic Inspiration roll).

Bonus 1d4 on grappling attempts (with Grappler feat).