Teleport to the Eastern Greilyn Jungle and head east up the hill. When the path turns to the south across a bridge, instead walk northeast around the ruined structure, then north toward the cave entrance up ahead. Enter An Underground Shelter and proceed forward and then turn to the east. There's a room off to the south, which contains some treasure. When ready, go through the door to the east, then continue east through the following doorway. Turn south and open any one of the three doors in the south wall to find Feldwyr in the next room. Enter and speak with him. When he asks for help in recovering his stolen anvil and Mythril Ore, agree to do so to initiate this quest. He'll note that he's managed to unlock the door to the east, which grants access to the area below, but hasn't managed to get much farther due to the ferocity of the enemies below. He suggests not venturing below until your party is stronger, regardless of their current strength. Your party should be around level 20 - 25, before heading below.

Head east into the next room, and continue east down the stairs until reaching the War Pedestal. Head down the stairs to the north and open the door at the bottom of the stairs. Continue through the doorway, then turn to the east. Cross the room and open the next door and go on through, then turn to the south. Turn to the east and open the next door to encounter a Plagued Hak'u Witch Doctor and a few minions, who must be defeated to obtain Feldwyr's anvil. Open the eastern door and enter the next room. Turn north and open the door, then enter the next room. There's a hidden switch on the left side of a small alcove on the east wall. Activate it to open a secret room to the west. Loot the treasure chest in the center of the secret room, then exit and head north. Open the door and enter the next room. Enter it and then turn west and open the door. Enter the next room, where you see a basket upon a pedestal to the north. Open it for some gold. Proceed west to find another basket on a pedestal to the north. Open it for some more gold. Open the western door and move into the next room, then turn south. Open the door and return to the starting room of the area. Head west through the already opened door and continue until turning south and take the pathway back to the War Pedestal, then continue down the stairway to the south. Open the first door into a large room filled with level 22 Taclak Bashers and Taclak Trackers. Deal with them. This room also contains two doors to the south and two doors to the east.

Open the southwest door first and enter the next room. Click on the pedestal along the east wall to open an "L" shaped secret room to the south. Enter it and destroy the attackers, then turn west and head down the stairs and open the door at the bottom and enter the room beyond to find a chest upon two stone blocks. Loot the chest, then back track to the large room. Open up the southeast door, and a horde of enemies will come streaming out, including a Decorated Taclak Tracker, who drops some decent treasure plus Feldwyr's Mythril ore. There's some piddly treasure in the southeastern rooms.

Open the southern east door for a couple of baskets containing a paltry amount of gold on the right as they enter. Note the dais in the southeast corner and the hidden switch on the second step. Left click it to open a secret room to the east. Enter the secret room and open the eastern door. Enter the treasure room and take out the six to eight Taclak Trackers and Bashers, who attack. There's a weapons barrel at the east end of the room, and armor stands at the north and south ends. Once done, return west into the large room and open the eastern door to the north. Enter to loot the armor stand at the east end.

Now head north and turn west at the War Pedestal and continue up the stairways until a cut scene occurs, showing Feldwyr's hammer being stolen, and a door opening behind him to the north. Proceed into his room and through the door to the north. There's a Traveler's Sanctuary to the west, openable by a Melee skilled player of nine or better. Continue on into an irregular well defended area, with a couple of level 24 Decorated Taclak Trackers near the rear, one of whom (denoted with a star on your compass mini-map) drops Feldwyr's hammer, after being dispatched. Return to Blacksmith Feldwyr, indicated by a star on your compass mini-map and who now has an orange question mark icon above his head. He thanks your character profusely for returning his hammer and says it will take him a few days to complete work on the fantastic weapon. He says that since commerce with Aman'lu has improved, he'll send it to his apprentice blacksmith brother Fyrndolf in Aman'lu, which your character obviously knows well and says so.

Head south and open the door. Enter to find some enemies and a swirly patterned elevator in the southwest corner. Activate the nearby switch and ride the elevator up to exit the area and re-enter the Eastern Greilyn Jungle. You can not complete this quest until your party has access to Aman'lu begriming in Act II. Teleport back to Eirulan.

Head west from the Aman'lu teleporter, then turn north at the tavern's front door. Walk down the hill and you'll note a white star inside the Equipment Shop. Enter and speak to Blacksmith Apprentice Fyrndolf. He'll note that your character helped his brother and he has received the package, which he gives the contents of to you, which completes this quest.