Annihilator of Mortha
Step 1 Down to the gates of expertise
Start in the caves south-west of Mortha: drop into the hole at 31416,32343 on the surface and through the hole at 31417,32337 on floor 8. On floor 9 walk north to the stairs at 31432,32295 and go down, then on floor 10 walk south to the ramp at 31434,32320 and go up again. Follow the corridor east to the gates of expertise at 31457 and 31459 (y 32332, floor 9): they need level 200, and every member of the team needs it. Wild warriors, ghouls, minotaur guards and fire elementals live on the way; bring a rope for the way back.
Step 2 Stand as a team and pull the lever
Four players stand on the stone tiles at 31461-31464 (y 32332, floor 9) and one of them pulls the lever at 31465. It works only with a player on every tile. The lever then stays pulled for four hours, so only one team at a time can be inside; it tells you how long is left.
Step 3 Defeat six Lilith
The team lands one floor below, on 31460-31463 (y 32332, floor 10), right in front of six Lilith: two at the end of the row and four in the niches above and below it. When they are dead, open the door at 31466,32332.
Step 4 Take one reward
Behind the door the four rewards lie on stones at 31468, 31470, 31472 and 31474 (y 32334, floor 10), so you can read their stats before choosing. The stairs in front of each stone lead down to its own chest on floor 11: an arcane dragon robe (31468,32335), a dauntless dragon scale armor (31470,32335), a soulshell (31472,32335) and an assassin doll (31474,32335). One reward per character. The magic forcefield at 31477,32332 (floor 10) takes you back to the corridor at 31453,32326 in front of the gates; on the way out take the stairs at 31434,32320 (floor 9) and 31432,32295 (floor 10) and use your rope at 31417,32337 (floor 9) and 31416,32343 (floor 8).