Blade of Light

Holding the hilt in both hands you channel your magic through it. A glowing blade of Radiant energy springs forth in the shape of a Greatsword blade. The spell ends at the end of your turn. You are considered proficient with this weapon and can use your spellcasting ability for this spell.

On your turn make a melee attack on any target within 5 feet of you. Attacks can be made on different targets and you can move between attacks. On a hit you do 3d4 radiant damage. 

At 1st level make one melee attack. At 5th level make 2 melee attacks. At 11th level make 3 melee attacks. At 17th level make 4 melee attacks.