The Collector utilized Transport Pods to move itself around to the main Holding Bay. Prior to this, it had relayed a psionic signal to the carrier unit known as Thokk to gather the rest of the swarm in the Holding Bay.
When the Collector fell into the center of the Holding Bay, liquids from traveling across the internals of the Vanguard unit dissolving around it, it saw that all the units had been promptly gathered around, eagerly awaiting the Collector's appearance.
Dotting the swarm were the newfound presence of additional Collective units. Primarily Striders that hopped about, weaving between the goblins or staying by their sides. All the Collective units were currently under a general command to patrol the insides of the Vanguard and guard the swarm units within, but other than this general rule, the Collector did not have the psionic capacity to control all of them at once.