Spear of Weakening

The Spear of Weakening (Yowame no yari, 弱めの槍), is one of 25 unique weapons created buy the Helixian Clan of Hexoshigakure. It's also known as Eternal Weapon Three.

Special Ability
It slightly weakens whatever it penetrates, weakening the status of objects or manifestations slightly more with each penetration. It completely weakens the durability, lowers the damage, and slows the speed of objects or manifestations down to 10% efficiency in approximately 25 penetrations.

Usage
The user only needs to pierce their target with the spear, as the effect will instantly set in seconds later. Due to this automatic ability, this weapon is one that should only be used when the ability is absolutely needed.