However, you cannot complete it until you complete the “A Mysterious Murder” quest.
You will find a group of cultists there.
The first fight is not difficult.
Actually, a fire elemental and a solid fireball will be enough to crush everyone.
You will see a scene between Zombie Jake and Thelyrone.
In the next chamber, you will find king Braccus Rex, who has been resurrected.
You should not fight if you’re below level nine.
Before the fight starts, prepare fire and ice elemental summoning spells.
It will be your most important spells in the battle.
The fire one will be absorbing Rex’s spells and Twins by Fire attacks.
If you have explored the vicinities of the city, you should know all the bosses and their attacks.
Only the guardian now has a new acid attack.
The only one that can go through, is the baron.
When he does, attack him with the whole party and he should die rather quickly.
Next in line should be the guardian, because he shoots from distance.
Use your elementals' range attacks to kill him.
When he dies, you have only the twins and the main boss left.
Don’t attack the twins with fire because it will only heal them.
Use ice attacks, which will massacre them.
After your ice elemental kills the twins, it will be only Braccus left.
Don’t attack him with fire, but use ice, acid, water or earth.

When he is enraged and near you, you have to teleport him back.
This way he won’t be a problem.
After killing him, return to the commander to receive the reward.
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