Ben's knives

Benz knives are the knives made by Benny Delon after every time he committed murder. Each of them is engraved with a number and incridibly sharp, enough to cut Silva Zoldyck's skin. Gon and Killua discovered that these knives can be found by using Gyo to detect the aura Benny Delon unintentionally left on them. At the present time, the prices of the Benz knives vary depending on the incised numbers, but each of them can be sold for at least 5 million Jenny.