Aeda's Invisible Phalanx

A pale blue glyph glows in front of the caster as a cone of force erupts to 40 ft. in front of them. Creatures caught in the spells area must make a Dexterity Saving Throw and take 8d6 force damage or half on a success. A shield of force remains around the caster until their next turn, raising the caster's AC by +1 for the duration.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd, and the AC bonus of the arcane shield raises by 1 for each level above 3rd.