Kosvax

Magical Shield of Drakit - a magical artifact, though not as powerful as the primary items of the 9 students.
Gifted to him from beings of fate from deep within Anytime. This shield reputedly drastically increases the damage of the wielder (upwards to +200%) by sacrificing their overall accuracy (attack bonus is reduced by at least 8, or 40%, whichever is greater.)
The location of the shield is currently unknown.