This quest will appear in your journal as you approach the place where the Vampiric Voidwokens (lvl 18) are fighting with the paladins.
We saw Paladins of the Divine Order battling against Voidwoken at the entrance to Arx.
Battle at the Gates
Related points of interest
Quest stages of Battle at the Gates
1. Killed Voidwoken Paladins Survived
The Voidwoken are defeated, and the Paladins are safe.
1.1. Quest Reward
2. Killed Voidwoken No Survivors
The Voidwoken are defeated, but the Paladins all died.
3. Corpses
There are corpses everywhere - those of Paladins, Magisters, and Voidwoken.