'THUNDERGRASP' Syntax: grasp Few can tame the thunder in Serin quite like the berserker, who uses the thunder grasp skill to drag those from adjoining rooms to the berserker's location. Like many of the berserker's finest skills, grasping thunder is too powerful to differentiate targets and is also considered an aggressive act. Dual wielding a segmented weapon is required to grasp the thunder successfully; otherwise, you'd just be grasping at air.