Vibratum

With a whispered word, you can set certain objects to vibrating. Choose a melee weapon you can see within range; it begins vibrating wildly. If the weapon is being held by a creature, it must make a Dexterity saving throw or drop the weapon; attacks with such weapons have disadvantage.

You can target 1 additional weapon at 5th level (2), 11th level (3), and 17th level (4).