Arcane Greatsword

You evoke a magic greatsword in your free hand. The blade is similar in size and shape to a longsword, and it lasts for the duration. If you let go of the blade, it disappears, but you can evoke it again as a Bonus Action.

As a action, you can make a melee spell attack with the sword against a target within 10 feet of you. On a hit, the target takes Force damage equal to 3d4 plus your spellcasting ability modifier.

Using a Higher-Level Spell Slot. The damage increases by 1d4 for each spell slot level above 2.