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.

You react and attack quicker than the eye can see.

After rolling initiative, you can use your reaction to treat your initiative as if you had rolled a critical success.

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

Pointing your weapon at your foe you challenge them, forcing them to lower their defenses so you can launch an attack of your own.

At the end of your turn, you can use your reaction to gain an expertise die to your AC against one creature you can see within reach. This increase to your AC only applies to the chosen creature and ends at the start of your next turn. 

If the creature misses with one or more attacks against you before the start of your next turn, you can make a melee weapon attack against it.

With practiced agility you weave around an opponent wielding a more cumbersome weapon, quickly darting in to strike with a lighter armament.

When a creature attacks you with a melee weapon that has the heavy property, or a Large-sized or larger creature attacks you with a natural weapon, you can use your reaction to make a melee weapon attack against it using a weapon that has the dual-wielding or finesse property.

You dart forward and snatch an item from a foe just as they start to use it.

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. 

You snatch something from your enemy.

When a creature is within your reach, you can use your reaction to make a Sleight of Hand check against it.