To start this quest, speak to Ol' Jay located at X:284 Y:135 in Darkdale.
After the cutscene, go to Giantwood Forest and speak to Shan Shan at X:296 Y:401.
After the scene, you will have a fight with 5 Fiery Foxes (25, Wizard, Non-Elemental, Witchcraft Attack skill) Along with Fiery Fox's true form (35, Wizard, Non-Elemental, Witchcraft Attack skill). Defeat them and obtain a Soulsucker.
Deliver the Soulsucker back to Ol' Jay in Darkdale and receive your rewards.