 Narud later reappeared in "Heart of the Swarm" after former UED Vice Admiral Alexei Stukov contacted Kerrigan with a message to seek out the Skygeirr Station research facility orbiting Ketill IV.Upon her arrival at the facility, Stukov explained to Kerrigan that Skygeirr housed the Dominion's primary Hybrid research and development laboratory, and that "Emil Narud" was actually an ancient shapeshifter in the employment of a fallen Xel'Naga named Amon.After the Zerg swarm breached the interior of the facility and began attacking the Hybrids within, Narud made his initial appearance, broadcasting a message throughout the facility to inform Kerrigan that she was not welcome in the station.