Sword Skill: Whirlwind

As a bonus action you can cast this spell, when you do your sword glows green until your next melee attack you make, any creature within a 5 foot radius of you must make a DEX saving throw, if they fail they take damage 3d8 radiant damage, if they succeed they move out of the way and don't take any damage.

A basic spinning strike that hits 3 times.