Eldritch Strike

You brandish the weapon used in the spell’s casting and make a melee attack with it against one creature within 5 feet of you. On a hit, the target suffers the weapon attack’s normal effects and an additional 1d6 force damage.

If a feature says it affects the spell eldritch blast, it can also affect this spell.

This spell’s damage increases when you reach certain levels. At 5th level, the additional force damage becomes 2d6, at 11th level it becomes 3d6, and at 17th level it becomes 4d6.