Startosser (5e Feat)
From D&D Wiki
Prerequisites: dex 13
Thrown weapons are extremely destructive in your hands.
• Your dexterity score increases by one to a maximum of 20.
• As an action you may make an attack with a weapon that has the thrown feature against a creature, if you hit you may you may choose to make an additional attack against another creature within range of the creature you hit previously you may continue until you've made a number of attacks equal to your proficiency modifier.