Info taken from Lilith's creator's original thread on the TitanQuest.net forum:
The Parchments Of The Beast:
1. Highland Satyr Boss Brian or Sahai Body’s Excision in the swamps
2. Tenar in Wartanen Tomb
3. Land/Level of the dead boss Bith Darr or by The Dart of Massacre in Kolops’s Liar
4. Vegetal Invoker Kristina in the Village of Thanton or Admiral Demon on Asteria’s Beach
5. Helgon in Helgon’s Manor
6. Elendar boss Aar-Bal-Liliths Butcher or Moose Boss in The Forbidden Mountains 2
7. Guardian in the Gardens of Mel’kaan or Gar-Wars Weakener outside the village
8. Darth Blade or Bith Darr The Everlasting Malediction both in the Citadel
9. One Who Cannot Be Named in Mountain Core
10. Spiderboss Djira Executor in the Fortress
11. Quest reward from demon Gibi or Firebull right before Draken's Liar portal
12. Draken
Note that they not always drop the parchment and that you have to kill them more then once to obtain it. Quit the game and return so he appears again.
The Secret Passages:
The Darkway nearby the rest point
13. Dead's Path west of the Giant Tree
14. Mausoleum in the room were you fight the thieves (inaccessible in this version caused by a bug)
15. Elendar Woods left to the portal
16. Kolopsos Liar behind some bushes
17. Helgon
18. Elendar Village map in the north
19. Library of Mel’ kaan Temple behind one of the rocks before the rest point
20. Scorpion Dungeon?
Note that this list isn’t complete for Lilith 1.1 if I understood Mostal well there is a 9th, who finds it?
The 7 Virtues:
Faith, Wp in the Highlands
21. Hope, Wp on Dead's Path
22. Charity, near RP on Helgon’s Promenade(Winding Road north of the Stroll portal)
23. Justice, The Two Bridges on your right,just before the entrance of The Park
24. Prudence, after the walls at Mistol's Shrine
25. Temperance, in Hudra’s Valley near the Yeti Cave
26. Force, Mel’ kaans Temple near RP, room doesn’t show on the map
How To:
Let the boss in Kolopsos 's Liar follow you into the bushes, he can't move very well that way so you can easily kill him.
The Gate of The Forgotten Clover won't open until you obtain the 2nd quest of the fisherman.
If the portal of A Fault in Siran's Mines won't activate, just go closer.
Be sure to have the Soul Gem for killing The Guardian. Don’t let your pet kill him. The Gem has to be in the main inventory. If it doesn’t work go back to the little room and drop the Gem, leave the little room and re-enter and pick up the Gem again, go back to the gardens and try again.
Clear the path before tipping the White Demon, you have better chance he'll survive and obtain the quest.
You have to kill the 3 lords before you can kill Draken.
The gates to Pandora’s Fortress won’t open, look for an entrance in the cracked walls.
You need the mirror to kill Sashami, he’s in the Northern School
Origins and End Key are used in the Mountain Core before entering Penitents' Chamber, look for a ramp.
You need Shara's Eye to make The Great Demonic Master (in Mel'Kaans Temple) become visible before you can kill him.
You cannot find the Great Demonic Master? When you reach the last chamber of the Temple of Mel'Kaan, there is a Liche King like character at the centre end of the room. You have to talk to it one or two times and then, he splits into three Liche King and you have to defeat them.
After that, you have to reach the Echoes Village to talk to Mordak who will give you the Chapel key.
At the area with the spider boss in The Asylum you have to activate the 5 elements in the right order before you can access Hydra's Valley.
How to kill the Final Boss:
You need to edge around to the sides and work your way down to the end. The final map is shaped like a trident. At each trident "point" there is an object that you can destroy. Once you destroy them, you will be able to damage the final boss. But be careful - destroying them also spawns new heroes that you will encounter when you head back to where the big boss awaits. You don't need to destroy all three before you take on the big guy.
