as an action, you summon a 15-foot-long arcane greatsword that you swing in a semicircular path (right to left or left to right depending on your choice, but by default its right to left). any creature in said path must make a dexterity save with a dc equal to 13+ your strength modifier. if they succeed, the avoid the attack, if they fail, they take 1d10 force damage and 2d4 slashing damage. if an attack against you is a critical success, or said attack would incapacitate you , the attack is interrupted and no other creature in its path are affected.