By focusing on keeping enemies off-balance, you help allies attack more effectively.

Whenever you hit a creature with a melee weapon attack, you can also take the Help action. On a critical hit, the target of your Help action can use their reaction to take the Dodge action.

You interpose yourself to take a hit for your ally.

When an ally within your reach is hit by an attack, you can use your reaction to swap places with them and become the target of that attack, taking half as much damage as normal.

You throw your ally at an opponent, lending them extra power.

You and an ally tackle a foe together, your combined strength forcing them to the ground.

Choose an ally you can see. Your ally can use their reaction to move up to 20 feet to be adjacent to a creature you designate. 

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. 

You focus on a deep and unspoken connection with your mount, lending it strength and working together as one.

Your mount makes an incredible leap, soaring through the air.

When your mount makes an Athletics check to jump, you can use your reaction to grant it a fly speed equal to half its Speed until the end of your turn. Your mount can only fly in a straight line.