Legendary Aura: Speed Force

You have tapped into the elusive energies of the Speed force, granting you access to immense speed. Increase your Dexterity score by +5 (this can go over the limit of 20). Also, when you use the Dash action when near another creature, that creature must make a Dexterity saving throw of DC 15. On a failed save, they are knocked back 5 feet and are prone. On a successful save, they are pushed away 3 feet.