Mounted Combatant

You have advantage on melee attack rolls against any unmounted creature that is smaller than your mount.
* You can force an attack targeted at your mount to target you instead.
* If your mount is subjected to an effect that allows it to make a Dexterity saving throw to take only half damage, it instead takes no damage if it succeeds on the saving throw, and only half damage if it fails.
Appears In: 5e Players Handbook