Krog Evil Quelling Quest

From AEWiki

Locate Warrog in the Temple of Ulthien. He will tell you about the evil creatures attacking the people, and he will ask if you would care to take up arms against the evil. Accept his request and he will tell you to kill a kobold, a snake, and a bat. He will even give you directions on where to find such creatures. Once you have finished, return to Warrog for 500 experience points.