Offhand Attack

Only usable if you take the Attack action and attack with a light melee weapon that you're holding in one hand.
Perform a single attack with a different light melee weapon that you're holding in the other hand.
You don't add your ability modifier to the damage of the bonus attack, unless that modifier is negative.
If either weapon has the thrown property, you can throw the weapon, instead of making a melee attack with it.