The Call of the Wild Mage

The Call of the Wild Mage is Neera's companion quest in, it can be started once you meet Neera near the Bridgefort entrance cell in Chapter 9 but cannot be finished until Chapter 10.

Neera is haunted, by Adoy, and she needs your help to get rid of his never-ending voices in her head, fast. Agree to help her brew her potion, she'll give you a list of the ingredients she needs: After collecting all ingredients, have Neera in party and rest somewhere, she will then prompt you to find an entrance to the Fugue Plane, travel to Kanaglym in the Underground River caverns to meet Adoy's ghost to complete the quest, you earn 18,000 XP as rewards.
 * 1) Potion of Perception, various places, sold by Belegarm at the Flaming Fist encampments.
 * 2) Giant Spider Leg, found in the spider lair in Forest of Wyrms in Chapter 9
 * 3) Planetar Feather, found in a cart near Vichand, who's involved in Edwin's quest, in the crusader camp at Boareskyr Bridge in Chapter 9
 * 4) Belladonna Flowers, found in the middle area of the Bloodbark Grove in Chapter 10 or from an imported save
 * 5) Wilhelmina's Miracle Turnip Juice, you only have one chance to get this potion so be sure to get it when you talk to Wilhelmina at the northern part of the Coalition Camp in Chapter 10, or if Neera is in your party, she'll purchase it from Wilhelmina instead.