This short story by Robert Rath follows everyone's favourite pair of rival bickering necrons, Trazyn the Infinite and Orikan the Diviner (of The Infinite and the Divine novel fame). Trazyn, whose quasi-eternal life's effort is to construct and fill a series of planet-sized museums with stasis-trapped specimens of cultural and historical value, may have bitten off more than he can chew with his new acquisition of a tyranid splinter fleet, complete with its hive tyrant. Once his attempt to rehydrate the damaged tyrant is nearing completion, psychic tweaks between the supposedly-locked tyranid horde start manifesting, and in no short order they're all awake and rampaging through the museum. Trazyn must commandeer the aide of a Mechanicus magos and a pair of Sisters of Battle to help him defend himself while he makes for the control room to try to save his precious displays - only then Orikan turns out to be there already, causing mischief.
This is a fun little story, but you'll get a lot more out of it if you've already read the novel I linked in parentheses above. Undead soulless metal killing machines they may be, but Trazyn and Orikan consistently prove they're far from boring.
