Thunderstone

When you take the Attack action, you can replace one of your attacks with throwing a Thunderstone. Target a point you can see within 20 feet of yourself. Each creature within 10 feet of the point to make a Constitution saving throw (DC 8 plus your Dexterity modifier and Proficiency Bonus) or take ld8 Thunder damage and be Deafened until the end of your next turn. A creature Deafened in this way also has Disadvantage on Initiative checks.