Eye of a Gate Lord
From Destinypedia, the Destiny wiki
The Guardian enters The Citadel.
The Guardian approaches the conflux and deploys the Ghost to scan it.
The Guardian proceeds through Waking Ruins and approaches Campus 9.
The Guardian approaches a Gate.
If the Guardian does not destroy any Gates for a period of time:
The Guardian destroys a Gate.
The Guardian continues through the path and enters the Endless Steps.
The Guardian clears out all of the Vex at the top of the steps.
The Guardian stands on the sync plate for a few seconds.
Zydron, Gate Lord appears. The Guardian kills it.