Ruuna the Blind wants you to obtain 4 handfuls of Gossamer Dust.
I will not charge you gold for my services, for I can foresee that your actions are necessary and much hinges on what you learn today.
I will, however, ask you to collect a reagent for me. Obtain gossamer dust from the fern feeder moths northeast of here. Do this and I will prepare a potion that will take you to the time and place where the events took place that you need to witness.