Arc 17Cairne’s Return
Robbie uncovered Medivh’s secrets as Sylvanas became the Lich King and Karazhan was sealed in time, while political upheaval spread through Stormwind and the Night Elves. Cairne returned as a worm-infected monster and marched against Orgrimmar, leaving Robbie and Vol'jin to maneuver the Alliance toward supporting the Horde’s fight against the Tauren.
- Aegwynn obliterated a captive blood clansman, while Cairne killed Saurfang the Great and helped lead the fight in Karazhan before Garrosh was pierced by a runed spear.
- Gul’dan freed Cairne from Sylvanas’s control, and Sylvanas possessed the Lich King’s corpse, shattered Karazhan’s defenses, and trapped Tirion in ice.
- Robbie rescued the Ethereals and found Medivh’s journal, which revealed Medivh’s plans, his love for Aixisi, and his rejection of her, and Experiment Subject No. 001 then sealed Karazhan in a time vortex as Sylvanas escaped.
- Robbie captured the two Gul’dans and brought them to Lunarfall, where Kel’Thuzad made a puppet body for Shadow Anduin, who took control of Stormwind while Varian remained king.
- Onyxia reclaimed Stormwind, while Tyrande pressured Greymane into supporting her campaign and prepared attacks on Stormwind, Westfall, and Shadowmoon Valley.
- Robbie and Gul’dan arranged a false oracle that sent Sylvanas against Gilneas, disrupting Tyrande’s plans, and the Ghost Advisors then helped Robbie identify Tyrande’s real aim as rescuing Gul’dan.
- A mysterious man transformed Cairne into the Burning Legion’s spokesman, and Cairne returned to Mulgore, killed Baine, rallied infected Tauren, and ordered them to march on Orgrimmar.
- Vol'jin sought Night Elf help against Cairne, but Tyrande and Malfurion chose not to gamble on an uncertain plan, and Robbie urged the Alliance to let the Horde and Tauren weaken each other, and Vol'jin decided to trust the Alliance.