Wayfriend, I disagree.
I do agree that the
haruchai disdain weapons and lore; there is much evidence to support this. I also agree they didn't view it as an
opportunity when Korik picked it up; Korik intended to take it to Revelstone. But something changed, and Korik did in fact challenge Foul.
So why would Korik challenge Foul? What changed? I think the stone had the power to affect the
Haruchai over time
because their Vow was an expression of Earthpower, and the Stone reacted to it . Korik would have immediately sensed this, because the Vow was his life. After all, (As Hyrim pointed out) their Vow was a potent enough expression of Earthpower to draw the Lurker of the Sarangrave to the mission. Earthpower beings themselves, the Ranyhyn were likewise affected. A Lord or commoner might have safely transported the fragment to Revelstone, but there were none left but Bloodguard at the Grieve. Because of the effect of the Stone on their Vow, the
Haruchai were uniquely suited for this trap, and I think Foul knew it; this sounds exactly like his methods.
Hyrim must have known this; his last words were to warn Korik to
neither touch nor take the stone. Why would he do this if they were immune or resistant enough to do something with constructive with it? He was warning them because he knew they would be harmed or corrupted in the process; he was the one to figure out that their Vow was drawing the Lurker when they were in the Swamp. If this wasn't the case, then he would have asked them to carry it to the Lords in the Warward, or on to Revelstone. but Lord Hyrim knew better. Therefore he warned them with his last breathe.
It was Korik's choice to take the fragment to Revelstone. He picked the stone up, and was soon after affected by the stones reaction to his Vow. He knew it was only a matter of time, and he made the decision to challenge the despiser versus risking losing the fragment to a foe before he could get it to revelstone, or allowing the stone to corrupt him, which would also be unthinkable.
Here is my logic:
1. It is called the
Illearth stone for a reason. The illearth stone corrupts the natural order of the Land (the earth in the story); there is much evidence of this. it was used to corrupt creatures. It was going to be used to corrupt the natural cycle of the ocean, when Kinslaughterer was killed. (Yes, I know in these cases it was wielded.)
2. Earthpower is a component of the natural order of the Land, in fact enforces it.
3. The Vow taken by the
Haruchai was sealed by Earthpower.
4. The Vow could have 'triggered' the ill effects of the stone. Or the Vow and the Stone reacted against each other.
5. Therefore the illearth stone could affect them through their Vow, as well as physically.
This is the crux of my story. From my point of view, Korik didn't really have a choice in the matter if you think about it: He could not have left the fragment where it was dropped by the Raver, because the next intelligent thing to come across it would be corrupted by it or use it for evil; there would be one more piece of the illearth stone left unaccounted for, which is unthinkable. Therefore, this was not a choice. Neither was hiding it for a later retrieval.
In my story, Korik knew / could feel that the stone was affecting him, and did not trust his ability to withstand it all the way back to Revelstone. Why? It would have taken too long, and time was a factor. He would have had to run all the way to revelstone. I do not think the Ranyhyn would have borne any rider who possessed such an abomination; being creatures of Earthpower, I don't think they could physically have done it if they had wanted to. This would have severely limited them and posed more of a risk of losing the fragment to a foe. Surely the stone would have drawn all sorts of creatures to them as they travelled.
So there is Korik, far away from both Revelstone and the Warward, and he has a fragment of the worst weapon Despite has against the Land. Time is limited. Knowing it could affect him and his party, knowing the danger it poses to the Land if he loses it to a foe or if it corrupts him along the way, what else can he do?
In this situation, I think it makes sense that if he can't re-enter the land with the fragment, and he can't leave or hide the fragment, the next logical thing is to confront Foul and deliver their best blow to despite. This is in keeping with their Vow to serve the Lords.
Did Korik (and party) think he could defeat Foul? I do not think they did. I think they wanted to try because it was all they had left to do. I certainly do not think they realized that there was something worse than death that could happen to them, as Lord Mhoram saw when he related that
I saw bloodguard marching in the service of the Despiser.