You create four balls of force that circle your person. As a bonus action on each of your turns for the duration, you can hurl one of the balls at a creature or object in range at which point it disappears. Make a ranged spell attack against the target. On a tit, the target takes 2d6+1 damage.
If you are attacked in melee whilst there are balls circling you, the attacker must make a dexterity save or be hit by one of the balls for 2d6+1 damage. The ball then disappears.
At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, you create one additional ball for each slot level above 3rd.
You cause force energy to radiate from yourself, causing you to gain a +2 bonus to AC for the duration. The energy pulsates from you and lashes around. Up to two creatures of your choice within 15ft of you gain +1 bonus to AC while they remain in range. During your turn, you can change which two creatures gain this benefit.
With a wave of your hand, you create a barrier of arcane energy to deflect attacks. You impose disadvantage on the attack roll against the target.