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Defeat the Dastardlies
Defeat at least two bosses.
Defeat the Dastardlies is a 10-point achievement earned by defeating at least two bosses across a rotating weekly boss pool that expands over six weeks.
Defeat Week 1 Bosses
In Week 1, four bosses are available: Glubtok, Baron Silvermaine, Lord Walden, and Watchkeeper Gargolmar. Defeating any two of these four bosses is sufficient to complete the achievement.
Track Weekly Boss Additions
Each week for six weeks, one new boss is added to the pool: Week 2 adds Hydromancer Thespia, Week 3 adds Mekgineer Steamrigger and Rattlegore, Week 4 adds Foe Reaper 5000, Week 5 adds Chrono-Lord Epoch, and Week 6 adds Broggok, bringing the total to 10 available bosses.
Tips
Since only two boss kills are required and four bosses are available in Week 1, this achievement can be completed on launch week without waiting for later weekly resets.