Arcane Protector

A Large spectral knight appears and floats for the duration in an unoccupied space of your choice that you can see within range. The knight occupies that space.

Any creature hostile to you that moves to a space within 10 feet of the knight for the first time on a turn must succeed on a Dexterity saving throw. The creature takes 2d10 force damage on a failed save, or half as much damage on a successful one.

As an action, you can move the knight up to 15 feet to an unoccupied space you can see within range