Istvan

Istvan was a daring swordsman known for taunting his enemies with his wicked, gleaming longsword. If his world-renowned taunts failed to scare off his enemies, he demonstrated to them the error of their ways with the Slanderer in one hand and Little Rogue in the other. It is said that he was so swift that his opponents seldom even saw the swords move before their entrails were lying on the ground before them.

In-game
Istvan is referenced in the descriptions of the Istvan's Paired Blades set in Diablo III.