Act 1 ends after you beat Maferil in "The Mind and the Madness" quest.
He is in one of the catabombs in the graveyard of Luskan. I got this achievemet after roughly 15 hours into the game. But this includes a lot of idling and wandering here and there.
There is one rather annoying puzzle in the Maferil dungeon where you have to light up a set of 9 orbs. Not sure if the starting of the glowing orbs is randomized. I had 1 orb in the upper left glowing. All others dark.
If you have it lit the same way. Hit the 4 orbs in the lower right once. (with the already lit orb in the upper left):
Y O O
O X X
O X X
Y = already lit up
O = do not hit
X = hit once
This should light up all 9.
Then hit all 4 corner orbs and the middle one once to make all 9 black and open the other door.
If it is randomized, you mess up or my description is to lousy, use this solver:
http://perfectweb.org/ddo/solver/vale_puzzle.htmlAfter this puzzle there is another puzzle in a room with a door (the final door to Maferil) 6 status on the wall and a large statue in the middle of the room.
You have to hit the 4 status on the wall that are holding stone plates in the right order:
1. most right one
2. most left one
3. second with stone plate from right
4 second with stone plate from left