Obtain the keys from:
Charm a young succubus, buff her with sanctuary and any armor spells you have then slowly take her to The advant of the caves. Give him the 3 keys then sayto him "sacrifice". The advant will kill the succubus which will award the mark and he will drop a huge bone key which can be used to reach The Dracolich.
Note: The ritual can only be done during night hours.
For performing the rites of the Dracolich, the Powers have granted thee a Mark. You have been granted the Mark of Rites! You gain 1000000 experience points! You gain 1000000 experience points! You gain 1000000 experience points! You gain 1000000 experience points! You gain 1000000 experience points! You gain 173,100 experience points! You gain 50 practices! You feel more evil.