Blade of Corruption

You bring forth a blade of abyssal energy in your free hand. The blade is similar in size and shape to a short sword, and it lasts for the duration. If you let go of the blade, it disappears, but you can recover the blade again as a bonus action.

You can use your action to make a melee spell attack with the corrupted blade. On a hit, the target takes 3d6 necrotic damage.

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.