Complete 25 of the following special encounters on Argus.
Mother Rosula slain
Chief Alchemist Munculus slain
Talestra the Vile slain
Blistermaw slain
Siegemaster Voraan slain
Squadron Commander Vishax slain
Soultender Videx slain
Tereck the Selector slain
Tar Spitter slain
Vrax'thul slain
Puscilla slain
Naroua slain
Commander Vecaya slain
Sister Subversia slain
Wrangler Kravos slain
Baruut the Bloodthirsty slain
Vigilant Thanos slain
Venomtail Skyfin slain
Captain Faruq slain
Ataxon slain
Herald of Chaos slain
Jed'hin Champion Vorusk slain
Overseer Y'Sorna slain
Instructor Tarahna slain
Commander Xethgar slain
Slithon the Last slain
Houndmaster Kerrax slain
Watcher Aival slain
Admiral Rel'var slain
All-Seer Xanarian slain
Varga slain
Worldsplitter Skuul slain
Shadowcaster Voruun slain
Gar'zoth slain
Mistress Il'thendra slain
The Many-Faced Devourer slain
Doomcaster Suprax slain
Rezira the Seer slain
Vagath the Betrayed slain
Imp Mother Laglath slain
Ven'orn slain
Khazaduum slain
Commander Sathrenael slain
Commander Endaxis slain
Soultwisted Monstrosity slain
Kaara the Pale slain
Feasel the Muffin Thief slain
Vigilant Kuro slain
Turek the Lucid slain
Umbraliss slain
Sorolis the Ill-Fated slain
Sabuul slain
Overseer Y'Beda slain
Overseer Y'Morna slain
Zul'tan the Numerous slain
Skreeg the Devourer slain
Wrath-Lord Yarez slain
Void Warden Valsuran slain
Lieutenant Xakaar slain
Commander Texlaz slain
Inquisitor Vethroz slain