I just killed the oversized golem and i am trying to get all of the marks squared away. i am just having trouble in finding the mark ixion.

Any ideas?

down in subterra at the pharos, either umbra penumbra or abyssal, he can appear anywhere down there but the way to know where he'll be in there is because all the other monsters will disappear. also if at all possible try and fight him in one of the rings parts instead of the rooms because in the rings his health is cut in half. but as far as i know he can appear in anyone of those areas so just keep looking i guess.

have you already killed the prylasore or however it is spelled

(too early)

yea i have killed the pylraster although as far as i know it's not necesary to do that before killing ixion if you have the hunt accepted already. and i found his exact health 306,559 in one of the rooms or 166,559 in one of the rings, the part you enter from the elevator.

how do you kill the last mark?
god or devil?

god or devil is the second to last one, you still have to fight yiazmat. to kill the seer though, god or devil hunt, you have to go to penumbra in the pharos and collect enough black orbs to light each room. only after lighting each room can you travel down another floor, also for the penumbra you need to kill the phoenix first. for the penumbra you need to collect a total of 36 black orbs, then the next floor is called umbra and that requires 57 black orbs, and finally abyssal requires 75 black orbs. once in the actual fight you need to kill all of his summons before you are even able to damage him, he will summon pandaemonium, slyt, and fenrir. then he summons phoenix again and once you defeat it you can attack the seer.that's more or less what you do. good luck