Erratic Wisp

As the caster speaks the verbal components to the spell, they are surrounded by ethereal mist. As the caster breathes in the mist they themselves becomes one with it, shedding their physical shell for a time. While in this semi ethereal state, when hit with a melee attack, the caster can use their reaction to gain resistance to that attack and be teleported 10 ft in a random direction. This lasts for 1 minute or until concentration is broken.