Echo

Echoes are events that have been undone in the past but still exist in the present or future. The act of echoing is the use of undoing a set of orders in the past to create a discrepancy between the perceived future and the actual outcome of the future. Modifying an event so that a timewave will not pick it up for a long time can be used to delay the visibility of a change, resulting in often tricking opponents. Echoes of events that have already been undone can linger long enough to conceal the true stable time line.