Circle of swords

You evocate 5 spectral swords which levitate around you in a circle.

Choose a damage type: ( radiant, necrotic, fire, cold, lightning or force)

You can use a bonus action to throw a number of swords (equal or lower to the current amount you have left) towards one (1) creature you can see within range (60 ft). 

Each sword has to make a spell attack roll and deals 1d4+your spellcasting modifier of the chosen damage type. (attack roll: 1d20+spellcasting mod.+proficiency bonus)

Each turn, while you have swords left, you can use a reaction (if a succesful attack roll was made against you) to add their number to your AC. When you do so, one sword disappears.

The spell ends when no swords remain or when you loose concentration.

At higher levels: add 1 sword per spell slot above level 2: (6 swords at 3, 7 at 4 ... 12 swords at lvl 9 )