Travel to Rexxie Copperclutch (requires at least Level 24). Use the map button to open exact NPC coordinates on the 2D/3D World Map.
STEP 2 · ZONE & OBJECTIVE ROUTE
Quest zone: City of Dalaran (Dungeon quest — enter with a party via the instance portal).
STEP 3 · TURN-IN & REWARDS
Return to In der Quelle nicht angegeben to turn in the quest and choose from 2 item rewards.