Two Weapon Slayer (5e Feat)
From D&D Wiki
Two Weapon Slayer
Prerequisites: The Two-Weapon Fighting fighting style.
You've learned how to master the arts of dual-wielding. Due to your mastery in this field, you gain the following benefits.
- When you attack and successfully hit with 2 light weapons during your turn. You can add an additional d6 weapon damage to both of your attacks. When utilizing a weapon that isn't light for two weapon fighting the d6 becomes a d4.
- When you drop a targeted opponent to 0 hit points or deal more than half than their hit point maximum in damage during your turn while using two-weapon fighting you gain the benefits of the haste spell until the end of your turn.