Gone with the Wind

The Source of Darkness hall had played a key role in this critical moment. Every time an Oathbreaker from the Army of the Dead moved within 100 metres of the hall, it would go completely out of control, either running wild like a headless fly or turning on its own allies. Of course, as long as the Oathbreakers stayed out of that range, they remained unstoppable!

But that was not all. The Source of Darkness hall also provided very powerful buffs to those inside it.

As long as a warrior remained in the hall, the hall would remain indestructible. The warriors fighting in the Source of Darkness hall would also be blessed by Sauron's power. Their HP would increase by 200%, their attack power and defence would both increase by 30%, and the damage they received from all ranged attacks would be reduced by 40%.