Quest: Black Wyvern Down (Part 3)
Curate Sabha looks over all the information that you have offered. He notices one poison, in particular, called Feverbane. Many notes seem to be scrawled in the margins next to it and he believes it is the poison the Ksaravi are trying to create. If they succeed in creating it, they no doubt plan to use it on Khal, which would leave the city dead and lifeless in a matter of days.
There is, however, a ray of hope. Feverbane can only be brewed in large pools, and if a Coronarian Censer is placed within such a pool then it should be neutralized. However, to survive contact with Feverbane you will first need to enhance your pair of gloves. Therefore, you must collect 4
Chactid Carapace Segments, 3
Mantis Leg Saws, 4
Corroded Rat Tooths, and 20
Ksaravi Fur Tuft.

The
Ksaravi Fur Tuft are easy to get, as they will drop from any Ksaravi in the whole gulch, and they are all over the place. The Ksaravi differ in levels, depending on where you are in the Gulch (from 14 2dot to 17 4dot, and all inbetween). Each Ksaravi will drop one fur tuft for everyone on the quest. Collecting 20 of these and you will be done this step.
Corroded Rat Tooths will drop off of the rats inside of the Gulch. They are spread out sparadically, layered in there with the Ksaravi. Luckily you will only need to collect 4 of these, which isn't too hard a task, and also depending on where you are in the Gulch will determine what level and dot the rat will be (all around levels 14 - 17). Collect your 4 teeth to be done with this step.
Mantis Leg Saws drop off of the Mantis-like creatures inside of the Gulch. They only spawn deeper into the Gulch, so fly around and be on the look-out for them. They will be around level 18 and vary in dots (most are 2-3 dot). Each one will drop a Saw, and since you only need 3, it shouldn't take you long to collect what you need.

Lastly, the
Chactid Carapace Segments drop off of Scorpion's that reside inside of the Gulch. They mostly show up in the middle section of the Gulch, and will vary in level from 16-17 (2-3 dot). Some will ride in packs of 3, while others will be wandering alone, but in the end you will only need 4 segments, and since each scorpion will drop one, it won't take you long before you a finished.
Now find a safe spot and right click your
Coronarian Censer, once again, to spawn the manifestation for the turn-in and your reward of a stronger pair of gloves.
Vibrant Coronarian Gloves (Tank)
Vibrant Coronarian Gloves (Caster)
Vibrant Coronarian Gloves (Melee)
Vibrant Coronarian Gloves (Healer)