Zeno.3906

This achievement tasks you with finding 16 unstable magic nodes. I found 15/16 however the last one states it's at "The Bone Gate" which isn't even an actual poi. The only place that makes any sense is the southern most gate that leads to desolation, after all it's the only "Bone Gate" in the zone. Nevertheless I searched high and low around said gated and found nothing. If anyone can shed some light on this it would be much appreciated.