Viper Rune

The Viper Rune (バイパーの紋章, Baipā no Monshō) is an attack rune which appears in several games of the Suikoden series.

Information
This rune could only be used by a bearer who wielded a one-handed sword in battle. When used, the rune would render the bearer's accuracy extremely low, but on a successful hit, the Viper Rune would kill its opponent instantly.