Proprionegation (🤯) is the “new, AgInfusion’d Nisei MK II”.

It's Archives-Redirection (IE. The Runner moves to the outermost position of Archives):

• is a quasi-EtR (against the originally-attacked server).
• can have a Forced-Encounter (given any rezzible Archives ICE).

For example, after the Runner has bankrupted themselves running through a glacial remote, you can “negate them” away (from your “IA’d” Charlotte Caçador or 2nd Proprionegation), and into a Bathynomus’d Archives (a 4 strength with ↳ Do 3 net damage.).

Proprio (vs Nisei):

• its redirection can't be prevented (“un-Shred-able”).
• it can't fizzle an If successful, … trigger, like against Clean Getaway (but not Transfer of Wealth): You can make them waste the click (on Run-Events that compress checking a server with generating some econ), but you can't keep them from gaining the 6[$] (unless your Archives is iced with a rezzed/unbreakable EtR).
• it can't protect Archives, like against Maintenance Access (or before a Deep Dive): You can make them waste credits, even suffer net damage, or so on (by re-encountering any Archives ice), but you can't also make them waste a click (by re-running).

Faction-Pie-wise, Server-Changing (in general) may be the “Jinteki-est of Jinteki” effects, related to how the faction:

• loves ICE-Swapping (like Tatu-Bola).
• cares about Archives (like Bathynomus).
• deals the most net damage (with any AP).

Flavor-wise:

• Proprio-ception is how you know what position your body is in, whether it's moving, and so on.
• Proprio-negation would inflict the Runner with somatic hallucinations, induce a sleep-paralysis nightmare, an inconvenient out-of-body experience, or so on.

Rules-wise (as the Runner):

• You're already approach’ing the ice: Thus, like Mitra Aman, the Corp can rez it but you cannot jack out (before encountering it, if rezzed, or just passing it, if unrezzed).
• But you can jack out before breaching (whether or not it's iced): If you fear accessing an Ambush ‘poisoning’ Archives (like Mavirus or Fujii Asset Retrieval).
• Your Server-Locked Run-Events are still ‘fizzleable’. In particular, Transfer of Wealth, which implicitly reads Run HQ. If successful [against HQ], … (Whereas Run a central server. If successful, … wouldn't fizzle.)

The Elevation box includes this “refcard”:

With Proprionegation, the Corp can send the Runner to Archives, no matter what server they were running before. The Corp can use this ability during any paid ability window, but will most often want to wait until the Runner passes all of the ice protecting the original attacked server.

If there is ice protecting Archives, the Runner will approach the outermost piece of ice. The Corp can rez that ice as normal, and the Runner will not have an opportunity to jack out until after they pass that ice. If there is no ice protecting Archives, the Runner will have an opportunity to jack out, or they may continue the run and approach Archives.

If the attacked server changes, "if successful" abilities won't resolve unless the new server is one that could have been chosen to begin with. For example, Transfer of Wealth specifies a run on HQ, so if that run turns into a successful run on any server other than HQ, the Runner will not take a tag or drain the Corp's credits. By contrast, Clean Getaway can be used to run any server, so its "if successful" ability works regardless of whether the attacked server changes during the run.