Uncover the Caches  

This is part of the Forest Ruins progressional series. It is given by Acting Lieutenant Germain (+900, -576) after you complete the Returning to the Disturance quest.

This time you must sprinkle nullification dust on 8 bushes spread throughout the zone. When you do this a Tool and a Tool Guardian gnoll will spawn. Kill the Tool Guardian and destroy the tool (right click) on each one.

After destroying all eight you should return to Germain. This opens up the Lure quest.