The Aaron kindly wrote the following script for me. It mass-removes or adds sight from characters game-wide when you issue one of the following commands: All PCs See: !set-has-sight --pcs --sight All PCs Blind : !set-has-sight --pcs --blind All NPCs See : !set-has-sight --npcs --sight All NPCs Blind: All NPCs !set-has-sight --npcs --blind Everyone Sees: !set-has-sight --all --sight Everyone Blind: !set-has-sight --all --blind Be careful, because these really do change all characters in the game. Here is the code The Aaron gazed upon his old code and like Athena Parthenus, new code sprang fully formed from his brow, ready to shine upon the world the new light of wisdom. Here's the Gist: <a href="https://gist.github.com/shdwjk/e01aff3741987d594357c7c1a0853980" rel="nofollow">https://gist.github.com/shdwjk/e01aff3741987d594357c7c1a0853980</a>