WoW - Dancing Sliver

This item is obtained from an Argent Dawn Quest called "Dawn's Gambit"

Thottbot has no real info so here it is:

Dawn's Gambit:

Objectives:

Place Dawn's Gambit in the Viewing Room of the Scholomance. Defeat Vectus, then return to Betina Bigglezink.
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I've placed Dawn's Gambit in the container you brought to us, the one that held the dragon eggs. Your job is to bring it deep within the Scholomance.

The undead mage Vectus leads a team of scourge scholars... place Dawn's Gambit in their chamber, called the "viewing room." It will then react with the undead found there and, with a little luck, destroy them!

After that, defeating Vectus shouldn't be a problem. Right?

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Rewards are as follows:
Dancing Sliver: http://www.thottbot.com/?i=18883

WindReaper: http://www.thottbot.com/?i=22285

You will be provided with the opportunity to choose one or the other. Enjoy.

Man ska läsa dom som är markerat med gult.

Edit: såg inte att Dawn's Gambit är en followup.