Originally Posted by Doran
Its like a theoretical element, possible for it to exist, but impossible to create, according to the Magic theory aristoleanesque grid thing - held to be something only the titans can do.
Since it replaced deletionism, rather late in the story, after the main plot has been sketched out, highly unlikely to play a key role.
Besides, Rob has said at least once that Retconjuration is solely the domain of the Titans, and thus if it has been employed, the characters don't know about it. (in fact, it has been used at least once, to switch Bogroll's special from Regen to Crafting - just in time for his death scene)