Stygian Abyss Dungeon
The Slasher of Veils awaits. Its prison weakening, it senses the coming victims - the curious, the adventurous, the heroes - the fools. Designed as the largest dungeon in the Ultima Online universe, the Stygian Abyss is host to new legions of creatures set on delivering their own form of vicious and terminal "justice."
Areas of the Abyss will be Player vs. Player, serving as battlezones where players are set against the denizens of the Abyss and other adventurers alike. Expect new boss monsters of unparalleled difficulty including the Medusa, Primeval Lich, and the Stygian Dragon.
Gaining Entrance
First you need 2 acid sacs from Acid Slugs (brown, not congealed green acid). Then you need to find the 2 hidden rooms blocked by vines. Use the acid on the vines to make the door accessible. The first room is just in the west room from acid slugs.
Hit the lever to raise the globe and reveal the key. Double-click key to get one.
Now the second room is northwest. Go through the slugs and winding passages to the undead room. There are two teleporters in this big room, you want to use the north one. You drop in an area with a Greater Poison Elemental. You can find the second vine room here. Raise the globe and get the key.
Now you need to go to the Ankh room. Go through the red gate and kill the evil mage. This part is the toughest. Not only is the spawn time ridiculously long (15 minutes), he is only as tough as an evil mage. As time goes on more and more people will arrive and make it more difficult to get this key.
Once you have all 3, double-click any to gain access to the Stygian Abyss stair.