Ride the Lightning

Acquisition
Signet of Capture:
 * Kunvie Firewing (Unwaking Waters (Explorable))

Trivia

 * Probably a reference to Ky Kiske's "Ride the Lightning" super from the Guilty Gear series of fighting games, as it has almost exactly the same effect. Both these skills are likely named after the Metallica song of the same name. The song, however, is named after the slang phrase for death in the electric chair.