Hub 5: Dark Crucible

Dark Crucible is the final level in Hexen. It is where you face Korax himself, along with an army of his minions. Although it is part of the Necropolis hub, you cannot return to any of the other levels once you have entered it.

Walkthrough
The player begins on one side of a bridge. Cross the bridge (while avoiding the instant-death fall past the edges) and open the door. Inside, there are three switches: one to the immediate left, and two on the walls near the door. Begin by pressing both switches nearest to the door, then the switch closer to the entrance. A random type of mana, possibly even a Krater of Might, will appear next to the two switches near the doors. Doing this every fifth time after the first (ie, 6th, 11th, etc) will cause four Dark Bishops to appear. The player can decide whether or not it is worth it to gain mana at the risk of losing health (as they will need to keep up their strength for Korax). Open the door when ready.

Beyond the door is a very large room, housing a few Discs of Repulsion on either side, and two Kraters of Might. There are also a few circular crushers in this room: avoid them at all costs. There are three doors here: one large one in the back, and two barrier-doors on the left and right. Korax is at the back and center of the room, and he greets you with a barrage of attacks. Attack him until he teleports away; when he does this, the two barriers on either side of the room will open up, revealing no less than sixteen Ettins in each room, for a total of 32. These small rooms hold four Crystal Vials and a Krater of Might each. Kill the Ettins, and the barriers behind the rooms that housed them will open as well, leaving you to deal with 32 Centaurs. Kill them as well, and the door in the back of the room will open.

The second (and final) room is about as large as the first, with two barrier-doors on the left and right sides of the room. There are stairs leading to the back of the room, where Korax himself resides initially. Beware of the two circular crushers as in the first room. Defeat him and a portal will appear at the back of the room. Enter it and watch the ending sequence.

Congratulations, you just beat Hexen.

Defeating Korax
Korax is no laughing matter: with a boastable amount of HP and an array of traps and attacks, one who faces this boss should use every single item at their disposal.

The First Room
In the beginning, the player should get used to Korax's most significant attack: his six-shooter. Each of his arms will shoot out a random blast, whether it be Green Chaos Serpent fireballs, Brown Chaos Serpent poisonballs, Afrit fireballs, Stalker acid blasts, Reiver spikebombs, or blue fireballs Slaugtaur. Regardless of the attack, being hit by all six at once typically causes death, even with full health. Fortunately, the attacks are and predictable, so they are easily dodged.

Korax moves extremely slowly, so it is very easy to attack him in this first room.

The tricky part of battling Korax in either room deals with the various traps he has laid out. In the first room, once he releases a blue flash of lightning from one of his hands, any one of these things will occur:
 * Spikes in the center of the room will rise quickly, starting from the front and moving to the back. After about five seconds, they will lower.
 * A majority of the floor will turn to lava. The only place where you are safe is the along the middle of the room, so it is wise to stay near there at all times.
 * Spikebomb traps will lower from the ceiling, randomly spewing fireball all across the room.

Once Korax takes a certain ammount of damage, he will teleport away and release an army of smaller monsters in two waves. Once they are defeated the door to the second hall and the next stage of the battle will begin...

The Second Room
In addition to the details mentioned in the first room, he can also do the following:
 * Open the barrier-doors on either side of the room. The first barriers will reveal sixteen Green Chaos Serpents in each of the rooms, and the second barriers will free sixteen Dark Bishops.  It is recommended to try kill Korax as soon as possible, so that he doesn't haave time to activate this one.
 * Teleport around. He can teleport to five different places: to the back-left corner of the room, the back-right corner of the room, the back-left side of the first room, the back-right side of the first room, and his original position.  He will always teleport in this order, although he can sometimes teleport in rapid succession.  It is advised to learn the path well so that it becomes easy to target Korax.
 * Summon Ghost creatures. These Ghost creatures will either be Centaur, Green Chaos Serpents, or Brown Chaos Serpents; they will not have corpses when they die.  Compared to the rooms with literally hordes of monsters, they are only a small threat.

Class Suggestions

 * The Fighter will have the most trouble, as Korax is very difficult to attack close-up: use Quietus from a medium distance for best results. If the player wishes to attack from a melee distance, it is highly recommended to expend an Icon of the Defender before doing so.
 * The Cleric has it fairly easy with his Wraithverge, although the player may want to conserve mana for the time being: Firestorm will take a while but gets the job done.
 * The Mage can use his Arc of Death to lock down Korax for a majority of the time, making it difficult for him to attack or activate traps: Bloodscourge is a faster (albeit lazy) option.

The player can leave the level without killing any other monsters in the second room other than Korax himself, so it is not necessary to defeat all of the remaining enemies unless they are directly in the way.

Bug Warning
Korax's retreat from the first room isn't entirely full proof. He teleports once he enters a walking state and his health has been reduced below a certain level. If he is kept from entering a walking state, he will never retreat and hence can be killed in the first hall. However this will make the level unfinisable as the door to the second hall will remain closed.

This bug is very easy to cause with the Cleric's Fléchette or Wraithverge, both of which can keep Korax forever in his pain state until death. Though you will need Kraters of Might to have enough ammo to cause the bug with the later.