Duplicative Deflection

You brandish the weapon used in the spell’s casting and make a melee attack with it against one creature within 5 feet of you. On a hit, the target suffers the weapon attack’s normal effects and is suddenly struck on its opposite side by a perfect illusory duplication of the weapon used in the casting of this spell. This illusory weapon adds 1d4 force damage to the initial hit, and than begins to float around the target until the end of your next turn. This orbiting copy remains either until a minute passes, or if the target makes an attack. The illusory weapon attempts to deflect the trajectory of next attack the target makes after the casting of this spell reducing the attack roll by 1d4. Whether or not the attack was effected the duplicate sword disappears.

At Higher Levels. At 5th level the die used increases to 1d6, at 11th level it increases to 1d8, and at 17th level it increases to 1d10.