Player's Handbook

Flame Blade

2-level Evocation

You evoke a blade of magical fire in your free hand. The blade is similar in size and shape to a scimitar, and it lasts for the duration. If you let go of the blade, it disappears, but you can evoke the blade again as a bonus action.   You can use your action to make a melee spell attack with the fiery blade. On a hit, the target takes 3d6 fire damage. The flaming blade sheds bright light in a 10-foot radius and dim light for an additional 10 feet.
At higher levels: When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for every two slot levels above 2nd.