Cyril's Cerulean Sword

You evoke a blade of lightning in your free hand. The blade can take on the appearance of any one-handed sword, 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 crackling blade. On a hit, the target takes 4d8 lightning damage.

The shocking 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 1d8 for every slot level above 4th.