“Little moment” is right, so Tyrande does this supposedly dangerous and highly powerful ritual, turns into “The night warrior”, kills some no-name mooks, and then... kills a single val’kyr, after struggling mightily against an undead human ranger, who gets away, taking two recently raised and immediately turned undead Night elves in tow, oh yeah, massive victory there.
Game-technically, getting even wasn’t in the cards, but this was a pathetic excuse for “revenge”, no matter how you look at it.