Even in Legends, the universal properties and effects of Force Nexuses has been ambiguous at best and uninterpretably inconsistent at worst.
Nexuses are canon again, but the are not quite the same as they were in Legends. For one, they're not even called "nexuses" anymore; The Phantom Menace established them as "vergences". Second, they also seem to be smaller and more localized. In Legends, vergences often enveloped whole planets (like Tython, Korriban, Ossus, Dromund Kaas, etc.). In canon, they seem to be smaller in scale, tied to specific locations (like Jedi Temples or Force Caves) or people (Anakin). The only exceptions to this appears to be the Wellspring (midi-chlorian planet) for obvious reasons, and Mortis (which was more of a realm/dimension than anything else). The first canonical nexus was the dark side cave on Dagobah, so yes, they're canon.
As for amping, there has only been one case of that potentially happening, and it's extremely debatable if that is even what it was. During the Mortis arc, Obi-Wan told Anakin "the planet [it wasn't one, but that's semantics] is the Force; use it". The problem is we don't know how that use was manifested; did Anakin receive a power boost, or did he just unlock his potential? This is important because before Legends was discarded, this was a moment Anakin was stated to have achieved Oneness, which is a moment where a Force user reaches the pinnacle of their power (something that ordinarily would only be achieved after death).
That's not even getting into the issue that Mortis was an extremely unique situation and circumstance, unlike anything anywhere else in the galaxy. Was this event unique to Mortis? Was it unique to Anakin as the Chosen One, conceived by the Force via the midi-chlorians, or is this something any Force user can potentially do? We don't know; nothing even remotely like it has happened again in canon, and it was an extremely dubious claimed-advantage in Legends, too.
In the end, for your second question, I'd say no; vergences do not definitively amp anyone, darksider or light.
Log in to comment