Fuss and commotion, and tangible rather than mental, this time...
Okay, so I obviously must see what is being reacted to, and follow in on Overseer's tail, past kindly Dustan and away from the places of wonder towards this figure (also of wonder?).
Do I see the dissipating darkness? In the midst of light? I am going to assume I catch the tail-end. Set down my lantern and go forward to inspect what I can of this effect, and also the figure creating it without blazing it with carried light that it obviously normally does without. "Brother Overseer, have you truly learnt so much so quickly? Hold yourself back a moment, let me first test the waters properly."
(Pre-post ETA: I may have to try to outpace and out-action Ziizo, it seems, if not everyone else, to try this approach... I humbly submit to the GMish dice rolling, in this regard, if nobody else takes heed of my already-written note below.)
I'm not charging the figure, merely approaching (and obviously so, not sneaking in from the side or behind) to see what I can see. Or not. And there's still scope for ranged attack, whether thrown, slinged, loosed or projected with some recently-aquired mentalism, if I provoke a similarly harsh response and need more help.
(There's light enough to be seen by, by those nearby. Let's see if we can compromise. If this is indeed one of the multiple Wastrels of whom we seek, it might be wiser to work out what one can do, before we ever meet an almost full encampment of them. And I know of an ascetic life, so maybe I can finally get some useful insight from the nature of this before things go south in all-out battle. We don't yet know if it has any friends nearby, even!)