This quest is not available in game.
Apothecary Johaan in the town of Brill wants you to bring him 4 samples of venom from a Vicious Night Web Spider.
While you were out gathering, I uncovered some old text in one of my tomes that indicates that an ancient plague wiped out thousands of innocent victims. Later it was discovered that the deadly agent in the plague was preserved through the venom of Night Web Spiders.
Bring me some venom from a Vicious Night Web Spider to complete this experiment. I want to see if the contagious element from the venom will work with my new concoction. Rumor has it the spiders can be found in Eastern Tirisfal Glades.