Crystal Weapon

You brandish the weapon used in the spell’s casting and evoke magical crystals to surround the weapon. 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 then the crystals surround the target until the start of your next turn. The next time the target is hit with a weapon attack until the spell ends, the target takes 1d4 piercing damage, as the weapon drives some of the crystals into the target.

This spell’s damage increases when you reach certain levels. At 5th level, the melee attack deals an extra 1d4 piercing damage to the target on a hit, and the damage the target takes from being hit to 2d4. Both damage rolls increase by 1d4 at 11th level (2d4 and 3d4) and again at 17th level (3d4 and 4d4).