The Drakaina
From Warhammer 40k - Lexicanum
The Drakaina was a relic of the Dark Age of Technology, discovered during the time of the Great Crusade.[1a]
The Drakaina is a singular pistol weapon, its pattern entirely unknown to STC canon and possibly even of xenos origin. Similar to a needle pistol in operation, the Drakaina fires a hybrid virus-toxin so virulent it can slay a target in seconds and leap to the next victim before what remains of the body has even struck the ground. How the Alpha Legion obtained or synthesised this toxin is but one of countless mysteries surrounding this most shrouded of Legions.[1b]