This is a technique where Luther goes into a state of hyper concentration and internalises all his abilities. When in this state he is able to make multiple statements at once within his own mind and see if they are true or not. Normally this would be of only limited usefulness, as it leaves him exposed to attack. However in Luther's hands this ability virtually amounts to true prophecy. By making the a series of leading statements within his own mind and seeing if they are true, Luther his able predict the course of events that are going to unfold.