Tiger_sword;283657 said:
Note though that we have never seen anyone use "wu" for magic (unless you count the spiritual magic i.e. wickan)
It could be that "wu" is simply the warren of burn but we have never come across another warren within someone though it could be along the lines of K'rul.
If that is true (wu = burns warren) the who the hell is burn and why is she so important. I knwo she is helping contain the cg right now but is she elder? I have never heard mention of her before she fell asleep (except for the fact that she must have talked to brood to give him his hammer)
I do hope we find out a bit more about Burn in TTH, could help answer this question
Alternately, "wu" could simply be the core from which all other warrens flow from/to though with other warrens being so complex and mixed its hard to see what (if anything) sets wu apart from the warrens
Burn is the sleeping goddess of Tennes...from MoI, from WJ's internal monologue:
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Brood's an ascendant—one forgets that, in careless times. His warren is Tennes—the power of the land itself, the earth that is home to the eternal sleeping goddess, Burn. Caladan Brood has the power—there in his arms and in that formidable hammer on his back—to shatter mountains
But anyway, re: the bolded part of your post: we DO know of a warren that exists within someone. The Mhybe's dream now contains the Beast Hold, it would seem (heavily implied in MoI, anyway). And the magic lines:
MoI, Tennes Witch to QB:
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'Why does Burn sleep?'
'She sleeps… to dream.'
and the burial of the Mhybe, protected by death, yadda yadda:
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'This is not a burial,' K'rul said to him. 'The Mhybe now sleeps, and will sleep for ever more. She sleeps, to dream. And within her dream, Murillio, lives an entire world.'
'Like Burn?' Coll asked.
The Elder God smiled in answer.
'Wait a moment!' Murillio snapped. 'Just how many sleeping old women are there?'
'She must be laid to rest,' the Knight of Death pronounced.
Coll stepped forward, settled a hand on Murillio's shoulder. 'Come on, let's make sure she's comfortable down there—furs, blankets…'
Murillio seemed to shiver under Coll's hand. 'After all this?' He wiped at his eyes. 'We just… leave her? Here, in a tomb?'
'Help me with the bedding, my friend,' Coll said.
'There is no need,' the Knight said. 'She will feel nothing.'
'That's not the point,' Coll sighed. He was about to say something more, then he saw that Rath'Fanderay and Rath'Togg had both removed their masks. Pallid, wrinkled faces, eyes closed, streaming with tears. 'What's wrong with them?' he demanded.
'Their gods have finally found each other, Coll. Within the Mhybe's realm, home now to the Beast Thrones. You do not witness sorrow, but joy.'
Anyway, there's heavy implication that "Wu" or whatever is now synonymous with Burn (not clear if it always was). The earth bleeds her blood when it's struck, tectonic activity is attributed to Burn tossing and turning. She seems to fill the role of Gaia... -ish, anyway. And people *do* use Tennes, which is Obelisk/Burn, right? So there you go. People do use the power of this warren -- Tennes.
Final thought (sorry for the monster post...): the planescapes of D&D etc are very similar to the warrens concept that SE employs. In that cosmology, the plane (read: warren) of origin for creatures aspects them/defines them to some degree (ie: all creatures from the plane of fire are fire-themed etc). The exception is the material plane, where everything is "normal" (...) in some sense of the word. The material plane is the only neutral intersection point. Could be that Wu is the material plane equivalent. It would fit to some degree; Light, Dark and Shadow are have obvious correlates, for example.