I take it the "key" is either the Vex Mythoclast of Pocket Infinity. However, there are never any lights shining down on that platform before the Templar. Even looking around for a light source on this spot doesn't exist. After further examination, there's nothing below the platform either. There is a rumor that knocking over those blocks turns red lights to blue and this even begins back in that hidden path under the first chest. How is this platform and/or those 6 spotlights a key?

I FOUND THE PORTAL TO THE SECRET VOG CHEST. if u just start the teleprlorting platforms don't go on the first one. Immediately go to the left till u see a cave. At the end of the cave look down and to the left. U s hould see it. I've gotten there before but me and my team couldn't open it we believe there is a sync plate near by. Possible on the huge pillar like platform just above it but we can't get there.