an apprentice marshall's greater training tome  

This quest is initiated by examining the item of the same name. This item is occasionally given as a reward for examining a Scrying Stone inside of the lights in Everfrost.

Once you examine this item you will have 5 minutes to kill 20 undead. Any type of undead will do, and in any zone. We recommend going to someplace like The Graveyard and AEing them as the time limit is rather short.