From Destinypedia, the Destiny wiki
Architector Goblins are a variant of the Goblin that appear in the "Hold Off Elite Vex" Public Event. They have the ability to connect and integrate with the Conflux in order to transfer information to other Vex units, and then disappear if the information has been transferred. If ten Goblins completely integrate with the Conflux, the event will end.
List of appearances