This story is included in:

Legacy Volume 4: Alliance

Comic Book published April 2008
as Legacy #22 by Dark Horse Comics:

Synopsis:
In light of recent events, Darth Krayt deems it time to teach a lesson in obedience-to the entire galaxy!
Emperor Krayt is displeased, and the price of betrayal will be exacted from an entire race, their suffering rippling to the edges of the Outer Rim. Yet his wrath will not stop there, as even among his own ranks failure will be dealt with cruelly and with lasting results. Old allegiances will be tested, and new bonds will be formed through pain and anger.

Synopsis taken from Dark Horse, www.darkhorse.com.

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