Shaker

Shaker, also called the Cursed Needle, is one of Bondrewd's personal Artifacts. It is manufactured from another relic, Curse Steel.

Description
When pierced with one of these, a human will be inflicted with the curse of the Abyss, the effect being greater with more exposure. Riko experienced the curse of the 3rd Layer, when struck. Bondrewd keeps the existence of this relic secret.

Trivia

 * Shakers don't penetrate. They assimilate with flesh when they hit and plant the curse onto the target. They leave no scars.