You command your animal companion to make a

When a creature successfully damages your animal companion, you order it to retreat. As long as it can hear you, your companion moves up to its Speed toward you in the most direct course it is able to, stopping at the end of its movement or when you are between it and the creature that injured it (whichever comes first).

An expert parry turns a hit into a miss.

With an array of quick, carefully placed attacks against the same opponent you throw them off their guard.

When you activate this maneuver, you take the Attack action and make a weapon attack, as well as any additional attacks granted by Extra Attack. After hitting a creature with a melee weapon attack, you can use your bonus action to make an additional attack against the same creature. 

On a hit with this additional attack, you can use your reaction to spend 2 exertion points and attack the same creature again.

Shouldering into a hard spin you lash out at opponents that have surrounded you, striking at each of them in rapid succession.

With expert timing you apply just the right amount of force to send an opponent’s weapon flying just as they strike.

As casually as any seasoned alchemist, you pluck the cork from a magical concoction and pour it down your throat or a companion’s.

You drink a potion or administer a potion to a creature within reach.

You rapidly lash out in a rising strike targeting your opponent’s brow, leaving a wound that obscures their vision.

A quick jab to a pressure point locks your opponent’s joints.

A quick step and suddenly you and your foe exchange places.

You can use your reaction to make a Sleight of Hand check when a creature makes a melee attack against you, turning it into a miss if your result is higher than the attack roll.