A superpowered character (generally a very powerful one) loses their powers for a permanent or extended period of time. This isn't just a case of Brought Down to Normal which inevitably ends, but a much longer-lasting if not permanent reduction in strength. This is often done as a long-term Drama-Preserving Handicap on the character in order to keep them in the cast without having to write them off or use really convoluted Green Rocks and Kryptonite Factor plots. (This may be accomplished by a Power Nullifier.)