Obtain the entry stone before assembling at the lair.
Audience with the Land Dragon, quest 337, starts with Gabrielle in Giran at level 50 or higher. Its Portal Stone permits passage into Antharas' lair. The quest's entry level is not a recommended combat level for fighting Antharas. A displayed 50–64 listing range must not be read as an upper entry limit.
After accepting Gabrielle’s request in Giran, complete the assignments from Kaiena at the Ivory Tower, Orven and Kendra in Aden, and Chakiris in Hunters’ Village. Their objectives involve Marsh Stalkers and Marsh Drakes, Blood Queens and the spirits they summon, Harit Lizardman Shamans, and Kranrot and Hamrut. Return each requested proof to its watcher before returning to Gabrielle. These are quest targets; killing an unrelated monster with a similar name does not advance that objective.
Gabrielle next sends you to Warehouse Chief Moke in Gludin and Blacksmith Helton in Oren. Complete their Abyss Jewel tasks and return the required fragments and fangs. Report to Gabrielle again, then speak with Gilmore at Dragon Valley. Cave Maidens and Cave Keepers lead to the final Abyss Jewel objective. Bring the third fragment to Theodric to receive the Portal Stone.
Verify that you have the completed Portal Stone rather than an intermediate quest fragment. The final interaction for entering the lair is with the Heart of Warding deep inside Antharas’ Lair. Make access preparation part of the pre-raid check: a character who can accept the quest at level 50 is not thereby equipped to fight the dragon. Open the quest’s individual steps for target locations before setting out.