Likely something like "Gain recognition from Tsarevich Boris for herself/the Hag Witch collective/Erengrad".
Probably also "Establish a closer relation and learn magic from the Grey Lords". And maybe "Gain some influence over the Colleges of Altdorf". Eight separate Orders each fully focused on a single aspect of their goddess must tickle them something fierce, even if (or maybe especially because) they themselves would never do something like that.
That's a copout answer, though, and we probably do have to actually come up with how a sword can come out of Ulgu before we can get anywhere with that, so its a good question.
I posted a couple of ways to bridge the concept gap a couple pages ago.
Teclisian Magic is all about a wizard's personal understanding of their wind, and if anybody's going to finally justify that Sword of Ulgu story, the LM who built her career relying on swordsmanship is probably the one to do it.
Not to mention the LM who with one stroke killed half a million souls with a combination of Ulgu and Zharrvengryn, the sword fabled to have separated a sub-dimension from the Aethyr.
Ulgu-Gazul connection is the thing we built and speculation due to thematic similarities.
"We" here being Mathilde from an IC perspective. Mathilde's paradigm and viewpoint is perfect for this and the reason no one did it before is because their paradigm didn't fit as well.
Magic isn't science. It's closer to science if you're a Dwarf or an Elf, but we are Human. A concept making perfect sense for a Wind in one specific Wizard's mind is exactly how you get awesome new spells that everyone else finds weird.
Or it simply means that the amount of Winds needed for that represent only a drop in the bucket compared to what is send back to the Warp.
Is it spit back into the Warp? I thought it was thrown out into space. Or am I confusing Warhammer canon with Warcraft canon?
Depends on context. In an assassination or intrigue action, sure. In a pitched battle, you probably don't want your wizards in the melee over casting spells in most cases.
Even during assassination there's gribblies that are hard to kill with a dagger. Especially if the target is relatively alert instead of sleeping and the assassin only gets close through superb stealth skills and the invisibility spell. Or if the assassin openly approaches an armed and armored target from the front and won't be able to get into hugging range. Summon a sword mid step, cut through the target and teleport away.
If they're at all intelligent they can probably realize that such an attempt would be tracked back to them, successful or not, and then they have at least two extremely angry Dwarf holds to deal with, just for a start.
@Boney What, if anything, is the weregild for a deliberate assassination of a Dwarf in good standing with the Karaz Ankor on behalf of a government entity? Or is this one of the things that mean war no matter what?