How to Summon Lyn the Ignored in City of Dalaran

Clear Shadowfang Keep and defeat Arugal. Climb the stairs behind his room and loot the Black Tome from the table among the alchemical ingredients. Its tooltip points you to the Ambermill Leyline Focus.[1]

Travel to Ambermill in Silverpine Forest and enter the town hall at the back of the settlement. The blue Leyline Focus is beside Archmage Ataeric, at coordinates 63.4, 64.3. Use the Black Tome there to obtain the Tome of Dalaran.[1]

Take the tome into the City of Dalaran dungeon and push through the Underbelly, past Atrexis the Grave Knight. Before taking the right-hand ramp toward the Arcane Anomaly, go straight and clear the small room beyond. Use the tome at the summoning circle on the floor to call Lyn the Ignored.[1]

The tome provides a way to summon an additional boss inside City of Dalaran, rather than simply serving as a collectible. The source does not specify Lyn’s drops, so be prepared to discover those in-game.[1]