Shig

So, I red a bit of the wiki on Forging, and I feel like a combination of Remembering (learning the spiritual history of the shardblade) and Soul Forging may make it possible to imitate being the original recipient of the Nahel bond. You wouldn't have to imitate everything about them, but changing that specific part of the spirit web would likely make the sword identify the Soulforged individual as the original wielder. Whether that would be enough to revive the blade is questionable, but I bet it would make it significantly easier.

Oh, I don't think it would be easy by any means. I basically think that in addition to reviving the oath, you need to appear to match as the person who broke it in the first place. Has there been any evidence of someone being able to change their spiritual identity?

Yeah, I'm of the same opinion that the powers, or Focus, comes from bonds as well. I just think that it MAY be possible to fake an identity (spiritually) to match that of the original person who created the bond, at least to the point of allowing a new bond to form, much like unkeyed metalminds look for the identity of the person who filled it, and finds that anyone matches it.

I believe it has been stated that surgebinding comes from both the user and the spren, so the only way to access those powers would be to not only have the connection to the spren (which could possibly be faked with feruchemy, as you stated) but you would also have to revive the spren as well. The issue there is that they were killed by having their oath broken, and the only person (with current knowledge) that could repair that oath would be the original wielder. We've seen with Shallan that it can be done (or at least Pattern was ALMOST dead) but the circumstances lie more with the spren itself, and not the connection. Edit: Also, I think thats kind of what fabrials DO, is fake surgebinding and/or evoking powers from spren directly; just not with dead spren.