Kai-surge is a Kai . When using their psychic ability to attack an enemy, Grand Masters may add 8 points to their Combat Skill. For every round in which Kai-surge is used, they need to deduct 1 Endurance point. They have the option of using a weaker form of psychic attack called Mindblast. When using this lesser attack, they may add 4 points to their Combat Skill without loss of Endurance points. Kai-surge, Psi-surge and Mindblast may not be used simultaneously. They cannot use Kai-surge if their Endurance score falls to 6 points or below. Psi-surge is a Magnakai Discipline and Mindblast is a Kai Discipline. As a loyalty bonus to readers, Lone Wolf may still use the earlier forms of psychic attack without mastering Kai-surge as long as he acquired them in earlier books.