Necklace of Vexation

The Necklace of Vexation is a craftable Hardmode accessory that increases damage by 20% when the player has under 50% life. While wearing Reaver armor with any headpiece, all attacks will inflict the Cursed Inferno and Venom debuffs onto enemies for two seconds.

Trivia

 * Vexation is the state of being annoyed, frustrated, or worried.