The anime experts at ABYstyle have found a way to seamlessly blend precision and brute force to bring fans merch they'll go Berserk over. With a design that showcases the devastating force of The Black Swordsman, a smooth fabric top that makes it easy to get your mouse where you want it to go, and a rubber bottom to keep it in place, it's the perfect accessory to bring with you on your journeys to the darkest reaches of the internet.