Mount Master (5e Feat)
From D&D Wiki
You and your mount have such great sync that fighting you becomes extremely hard for your foes. While you are mounted and aren't incapacitated, you gain the following benefits:
- As a reaction, you can have an attack from another unmounted creatures smaller than your mount to have disadvantage on their attack rolls.
- You can't be dismounted unwillingly, and you only use 5 feet of your movement to mount or dismount.
- You can chose to not have yourself nor your mount provoke opportunity attacks when moving out of an enemies reach, but you must spend at least 5 feet of your movement speed for each cluster of enemies you wish to evade. This speed is used to place you just beyond their reach before they have time to react.
- As a bonus action you can have your mount make an attack action on your turn if your mount is capable of attacking.