Taar is the character, who removed the prisoner collar from around your character's neck. She remains in the Eirulan Great Hall where your character first met her, if she has not joined your party. You will need to have her in your party to initiate this quest. If you do not currently have her in your party, head south from the Eirulan teleporter to the next tramway, which takes your party to the Great Hall and Infirmary. Board the tram and take it across to the intermediate stop, then board the second tram and continue across to the Great Hall. Enter and you'll find her in the southeast side of the foyer. Ensure you have an open slot, then speak to her and she'll offer to join your party. Accept and head back out and walk south over to Arianne's house and have Taar speak to her. Arianne expresses surprise that Taar is leaving the village. Taar says that she is not afraid of the Morden. Arianne then launches into a rambling tale of a terrible beast and you'll see a short cut scene of Arianne's visualization of a large ferocious beast pursuing her and her friend. She mentions a Hak'u Ceremonial Blade, which can be found in the Northern Greilyn Jungle. Agree to investigate to initiate this quest, after which you may want to head back over to the Blacksmith Shop and upgrade her armor.

Use the teleporter to get to the Northern Greilyn Jungle. If you press the 'Tab' key, you can see a star on the map to the northwest, which is your goal. First head northwest and cross the bridge over the river and walk up the hill. Face north and head past the Health Shrine onto the next bridge. Cross it to enter A Hak'u Ritual Camp. Destroy the attacking Hak'u, then approach the altar and left click on the top to cause a Ceremonial Blade to be dropped atop it. Ascend and pick it up.

Teleport back to Eirulan, then head south past the tramway for the Great Hall, Infirmary to the Pet Shop, South Gate tramway. Head across to the Pet Shop and proceed southeast toward the South Gate. Take the elevator down to The Southern Greilyn Jungle and start out to the south. As the path turns to the east, continue south past the small Hak'u encampment and through the pass to the entrance of A Dark, Bone-Filled Cave, then enter the cave.

Equip a character with the Hak'u Ceremonial Blade, if you haven't already done so, as no damage can be inflicted upon the Garganturax until someone wields the Hak'u Ceremonial Blade. Stay to the east side and continue south farther back into the cave and engage in battle with the not so large Garganturax beast and destroy it. Note that here's another minor game bug in that on screen you see that your party has received a Miniature Dinosaur, but the Lore Journal shows and describes a Garganturax Head.

Teleport back to Eirulan and return to Arianne with the beast's head to receive considerable treasure plus gold. Taar seems a bit disgusted with Arianne, who then contritely bestows the quest rewards upon the party and this quest is completed.