Nightblood vs Shards

[The Grumpy Elantrian he/him]

So, Nightblood is basically a super op sword that we have never seen defeated and according to the Nightwatcher "can never be defeated". We also know he is fairly similar to a shardblade in the way he acts, but far more powerful.

So my question is, would a regular shardblade be able to block a strike from Nightblood? Would shardplate be able to block it the way it blocks regular shardblades? 

Would Nightblood just consume the blade and plate (i.e. consume the investiture of the shards)? Would this result in, when Nightblood strikes a shardblade, just kill the spren that acts as your blade and so stop you from being a radiant any longer? What can this thing do?

Thanks in advance for your insights. 

[Calderis he/him]

Nightblood obliterates anything that it can cut. Even the tiniest nick.

Shardblades are, at least to in world knowledge "indestructible."

Nightblood is "orders of magnitude" more invested than a Shardblade... 

So what I think is going to happen, is that for the most part, a Shardblade will successfully block Nightblood... But if he is able to so much as dent the material, it's done. 

As for plate... Nah, that's gone. 

[Weltall]

Nightblood would probably look at Shardplate like an Investiture Buffet. As for a Blade, we have this:

Quote

Questioner

What would happen if a Shardblade hit Nightblood?

Brandon Sanderson

Nightblood would act like a Shardblade, in that it would stop a Shardblade. It is significantly more Invested than a Shardblade, so it would have some ramifications beyond that.

source

I suspect if you were holding the Shardblade you wouldn't want to swing too hard and you wouldn't want your blade to touch Nightblood any more than necessary. My guess is a Shardblade would be better equipped to resist Nightblade but it would still ultimately be destroyed with enough time. When Hoid is sufficiently terrified of Nightblood that he wouldn't want to be anywhere near it, I don't think a radiantspren is going to do terribly well.

In the thought experiment of Nightblood striking a living Shardblade, my guess is that since the soul of the spren and Radiant are merging into one, it would do Very Bad Things to the Radiant, basically the other side of the coin to what happened to all the 'deadeye' spren.

[Gasper he/him]

1 hour ago, The Grumpy Elantrian said:

and according to the Nightwatcher "can never be defeated". We also know he is fairly similar to a shardblade in the way he acts, but far more powerful.

I would not put too much trust in what the Nightwatcher says, I get the feeling that she is not always a reliable source of information.

[+Ark1002]

When I saw the title, I thought you meant the 16 shards...

I agree with the above comments.

In regards to the spren, it would most definitely kill it, as a regular Shardblade has killed spren.

In regards to being Radiant, it would probably be the same as Kaladin did, but more abrupt and jaring, more of a rip out of your soul then a fading away.

[DeadSurvivor]

What about if it was a dead shardblade? 

Would he just consume it like something else?

Or, since its dead could nightblood even see the blade itself as evil?

Edited November 24, 2018 by DeadSurvivor

[Calderis he/him]

26 minutes ago, DeadSurvivor said:

What about if it was a dead shardblade? 

Would he just consume it like something else?

Or, since its dead could nightblood even see the blade itself as evil?

"dead" doesn't really mean the same thing here. 

Their still a spren made into a solid, physical manifestation if Investiture. 

Living or dead, I don't see it behaving differently in this instance. 

[The Grumpy Elantrian he/him]

So perhaps a shardblade would block nightblood, but the mentioned 'ramifications' could be the gradual lee hing of investiture and it's eventual consumption?