Travel to the Dalaran Spire via Aethas' portal.
Kathra'natir is powerless to stop us from harnessing his energy within the Nightborne Soulstone. We have been lucky thus far - our allies have kept news of the sabotage from spreading. We should repair Dalaran's weapons array immediately while luck is still on our side. Oh - the weapon platform is a bit inaccessible. I trust you are not afflicted by a fear of heights? I will open a portal.
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