Centaur Combatant

You are a dangerous foe to face, while an ally is mounted on your back. While you have a creature riding you and aren't incapacitated, you gain the following benefits:

• Creatures mounted on you have advantage on melee attack rolls against any unmounted creature that is equal to your current size or smaller.
• You can use your reaction to force an attack targeted at your rider to target you instead.
• Equine Evasion. When another creature is mounted on you and they are subjected to an effect that allows them to make a Dexterity saving throw to take only half damage, they instead take no damage if they succeed on the saving throw, and only half damage if they fail. You can use this feature a number of times equal to your proficiency modifier per long rest.