Vassal Whip

The Vassal Whip or Seven Star Whip, also known as the Whip Spirit of the Vassal Weapon. The spirit is from another world prior to being summoned to another world, the Vassal Whip is one of the eight Vassal Weapons present in the world which Naofumi currently resides in. The candidates of the weapon have been given the title of Whip Hero, whom they are generally addressed as so by the locals. The current candidate of the Vassal Whip is unknown.

Overview
The first known Vassal Whip wielder was Holn Anthreya - an alchemical researcher who lived in ancient times before the Bow and Shield world merged with the Sword and Spear world.

In the present day, the first known wielder of the Vassal Whip is Takt Faubrey. He apparently was selected for the Vassal Whip after winning a martial arts tournament in Shieldfreeden. Whether he was legitimately selected or he used his weapon stealing ability is unknown. Eventually, Takt began his venture to take over Raphtalia's World. He killed as many Vassal Weapon wielders as he could find for their weapons and started to take over countries. Takt was eventually defeated by Naofumi who used his authority as a Holy Hero to strip Takt of his Vassal Weapons - including the Vassal Whip. The Vassal Whip flew away and the wielder is unknown.

The special ability of the Vassal Whip is to control the power of monsters.

Power-up Method
Growth Revision: Sacrificing levels can draw out latent abilities and permanently increase stats of the target.

Trivia

 * In the Web Novel, Takt Faubrey wielded the Vassal Whip then later wielded by Wyndia.