You redirect your enemy’s attack back upon itself.

With a vicious strike, you

You nearly lose

All your training culminates in this lethal attack. You deliver the perfect killing blow with a single secret technique.

You and your allies combine forces and attack a single foe with devastating results.

Make a melee weapon attack against a creature. Any willing ally within your reach can use their reaction to make a melee weapon attack against the same creature. 

If the creature is hit by two attacks, it takes extra damage equal to your proficiency bonus. 

You offer inspiring encouragement to an ally and they gain their second wind.

When an ally you can see takes damage from an attack, you can use your reaction to release a hearty rallying cry. As long as they are able to hear you, your ally regains an amount of hit points equal to twice your proficiency bonus.

No matter how far away a foe is, if you can see them they’re still in danger.

You can literally hear the sound of incoming missiles and react to them easily.

Until the end of your next turn, you gain blindsight to a range of 20 feet. When you are hit by a ranged attack, you make a Perception check against a DC equal to the attack roll. 

On a success the attack misses you, and on a critical success you redirect it back at the attacker.

You repeatedly charge your mount at your opponent, attacking again and again.

Your mount takes comfort from your presence and gains its second wind.

When your mount is hit by an attack, you can use your reaction to pat it reassuringly. Your mount regains hit points equal to your level.