fun fact: if you did those quests as a non-blood elf, thrall openly mocks blood elves for needing your help and the help of an entire regiment of the forsaken to take care of their own problems lol
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<Thrall begins to read the letter.>
So the blood elves finally took care of their little problem. Never mind that it took your help as well as that of an entire Forsaken regiment to get the job done.
<Thrall breaks into laughter.>
I suppose there's no stopping this. In the end we need them just as much as they need us.