Withersbane

The Withersbane is a Gold sword with the ability to spread its damage from undead entities to other undead entities. Entities considered undead include Skeletons, Wither Skeletons and Zombie Piglins.

Obtaining
The Withersbane can be found in a small room at the center of a round table representing a war map which as a chance to be found in the Forbidden castle.

Possible upgrades
The Withersbane can be upgraded with any sword enchantments.

Description
An ancient blade to smite the impurity from the Nether