Guild Wars 2

Hey guys, I am currently on the last tier of collection for the legendary the bifrost. I got all the collection items except one which I can not seem to get from any of the mobs. The item is the Golem’s Light which I use the maws lens and a quartz crystal to channel a beam. I have tried on every golem I could find and have had no luck completing it. If anyone can give me some insights or know which golem may give it it would be much appreciated, thanks.

At Dry Top > Entrance of the Cavern of the Shining Lights. There is an event to open the caverns entrance, including a veteran golem. He does an attack that you can absorp.