This is the Agent of Change for the Plane of Hate instance.
It is located on the lake shore, east of the spectre tower at 3987, -1949, 4
Agent of Change says 'Ah, another who thinks themselves worthy. One more that believes they are capable of defeating the greatest of foes. Are you one that thinks they are immune to danger?'
You say, 'danger'
Agent of Change says 'So you believe, so you think. As you wish. I can grant you entrance where you are ready.'
You say, 'ready'
Agent of Change says 'Your life is in your own hands.'