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Here you can buy Nemesis: Scourge of the Kaldorei
This quest starts and ends in Frostwall.. You need to kill 500 Night Elf players in PvP combat across Draenor.
Upon completion of this quest you will gain:
250 Garrison Resources
Scourge of the Kaldorei achievement
You will get uniqe achievement
250 Garrison Resources
Nemesis: Scourge of the Kaldorei achievement
"Scourge of the Kaldorei" title
builded Gladiator's Sanctum at least Level 2 in your Draenor Garrison
if you have level 2 sanctum, you can get the quests then. Possible to build it in 2 hours if you don't have it yet.
Alliance and Horde have different titles and achievements