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None Shall Pass
Defeat the Amalgam of Corruption without allowing any unleashed corruption to fuse with it in Siege of Orgrimmar on Normal difficulty or higher.
None Shall Pass requires you to defeat the Amalgam of Corruption in Siege of Orgrimmar on Normal difficulty or higher without letting any unleashed corruption fuse with the boss.
Enter Siege of Orgrimmar
Enter the Siege of Orgrimmar raid and make your way to the Amalgam of Corruption, the third boss in the instance.
Burn the Boss Down
When the Amalgam of Corruption becomes attackable, use Bloodlust or Heroism and deal as much damage as possible. Burning the boss quickly before small adds can fuse with it is the most effective way to earn the achievement.
Block or Kill Small Adds
If small adds do spawn, stand on top of them or kill them immediately to prevent them from reaching and fusing with the Amalgam of Corruption. Avoid ignoring a large add if one appears, as it reduces the boss's health.
Tips
See the video guide for a visual walkthrough of the encounter.