Quest - The Call of Antharas High Five
There is an item that takes you directly to the Heart of Warding...
Antharas Minions (Step 1)
Obtain leather pieces from the Tarask Dragon and the Behemoth Dragon in Antharas's Lair.
No more Minons (Step 2)
Bring the Tarask & Behemoth Dragon's leather pieces back to Antharas's Watcher Theodric.