Bloody Fissure Thunder Thrust (or simply Thunder Thrust) is a skill taught to Luka by Alice after he sets up camp with her after the Leech Girl’s defeat. Luka omits the “Bloody Fissure” part, leaving only “Thunder Thrust” because it sounded too “long” and “disgusting”.
It consumes 2 SP to use and deals significant damage if used on the first turn; however its effectiveness is decreased if used later.
Thunder Thrust is eventually replaced by Lightning Sword Flash.