Go to the Hero Cave, north of the city of Edron (1). You will face three Hunters at the entrance. Go down the hole there. Watch out for Demon Skeletons, Priestesses, and some minor creatures. Go down the next hole (2), and north to another hole in that room (3). This room contains a Monk, and some Demon Skeletons, Dark Magicians, and Wild Warriors. Here go east and north to the next hole (4). This room contains 3 Dragons and some Dragon Hatchlings. The hole is in the middle of room (5). Here you can find a Hero and some minor creatures. Go around to the main floor (6).
Be prepared to be swamped with creatures. Kill them, and head south to the end and then east. At the next crossroads are some Minotaurs. Take the south path and down the stairs (7).
This is the Temple of Xayepocax. Here you will face 3 Demon Skeletons, 3 Monks, 3 Hunters, 2 Heroes, 2 Priestesses, 2 Witches, 2 Dark Magicians, 2 Dark Apprentices, an Orc Shaman, a Stalker and a Warlock. Once you have killed them, go to the back of the room. Enter the level 70 gate of expertise, and retrieve your reward of a Vampire Shield and a Dragon Lance from the chests.