I play as a swordman & this is how i able to get the dark knight, shaman.

After you finish the scenario, go to the swordman guild and talk to the dark magician.
Then go to Order of Knight and take the mission to search for a dark knight at Glast Heim
(you can find him at Glast Heim: Room 2). Defeat him and you'll received a sword.

Before report back, go to the Glast Heim's altar to receive the 2nd story item 'Vidofnir
Wing'.

Report your finding at the Order & you'll received 'Bloody Sword'. Return to swordman
guild. You may talk again to the dark magician or just talk to the new person appear in
the guild to change class to dark knight.

You can also get to change class to shaman. You need to finish the scenario and go to
Acolyte Guild and talk to the person with staff. She'll give you a quest. Finish it &
you'll received a 'Yggdrasil Branch'. Return to Acolyte Guild and talk with another new
person in the guilg to change class to shaman.

right on time i finished it last night so this will be perfect!

how to go to glast heim? i'm stuck in labyrinth forest

I already turned into a assassin :(

When you reach Job level 30 in your high class you can limit break. It brings you back to
noob status B.lv1 and J.lv1, except you will have more status points, you can do this over
and over till you get tired of it. this way you can switch to dark night.

you need to defeat all the monsters there, and if you die in glass heim the way through
the forest is go thru the warp on the left, go thru the warp on the left, go thru the warp
on the left, then go thru the warp on the north then go thru the warp on the north. Tada
your in glass Heim

You must obtain dark sword from a quest in the knights brigade.. then after you get the
sword a man will appear in swordsman guild then talk to him to change job?

after you enter the labyrinth go left 3x and up one times to enter to glass helm..simple
as that ^^

if i became a knight now..
can i being a dark knight again??