Template:2009spoiler The Teral'n was a staff weapon that had two retracting blades. Nero was in possession of the Teral'n, which he used to kill Captain Richard Robau in 2233 of an alternate reality. (Star Trek)
Apocrypha
Nero's acquiring of the Teral'n is explained in Star Trek: Countdown. In the book, the Teral'n (referred to as the "Debrune Teral'n") was an ancient weapon which served as the greatest symbol of the Romulan Star Empire. In the book, the praetor was in possession of the Teral'n when he and the ruling council of the Romulan Senate were beamed aboard the Narada following the destruction of Romulus. Angered that the Senate refused to believe Romulus was in danger, Nero took the Teral'n for himself and used it to kill the entire Senate.