Morrison took part in the unit's ill-fated mission to Vygoire, assigned to investigate a Dominion lab complex that had stopped responding to hails. Terrestrial and orbital observation showed that while the complex had suffered damage, it appeared to be from natural causes, such as a landslide. As per urban-recon protocols, the facility was investigated, the unit discovering human remains, but no living scientists.
The marines headed into the jungle. Sergeant Norwood Doakes assigned Chen to investigate a clearing that had a lot of bent and scarred trees. After returning to the group, he reported that there were large quadrupedal tracks through the clearing. As if on cue, a roar sounded through the area. It was at this point that one of the marines started freaking out, screaming about coordinates, gods, and a "Great One." He ran into the jungle, and an ultralisk came charging back in his place. Morrison was impaled by one of the creature's kaiser blades and flung off into the jungle, his entrails spilling out of him.