Necrosis

Necrosis, a legendary level 98 helmet, plays a big role in many Cancelstack builds, unless you are already using a weapon with a high attack speed beyond Super Fast to start with, such as Skien's Madness, Overdrive or Panic Zealot. It also has a great amount of Life Steal which is useful in battle. You should however keep in mind of its 120 Dexterity requirement as that may serve to a challenge for builds using this.

Lore
"450 years ago a demonic plague like no other spread through Gavel, killing thousands. That is, until a priest encased the disease inside a helmet and warned everyone never to wear it."

Trivia

 * It was previously known as Cancer prior to being renamed Necrosis and Cancers place being taken by the current helmet.