Arcane Blade

You touch a melee weapon and imbue it with arcane energy. Choose a damage type between fire, cold, lightning, acid, radiant, or necrotic. For the duration, the first successful hit with the weapon on each of your turns deals an additional 1d4 of the chosen damage type.

At Higher Levels: When you reach 5th level, the additional damage increases to 2d4. At 11th level, it increases to 3d4, and at 17th level, it increases to 4d4.