A house that has a Hidden Item of "Graviton Axe" and Inquire/Scrutinize "New Weapons for Sale" from a Townsperson inside the house which is directly below the Provisioner & Armorer shop. Olberic can only Challenge the Townsperson (strength 8/10) blocking in front of a house at Level 60 and above. However, H'aanit can Provoke him way earlier but he's strong with Attacking Posture + Pearless Strike can inflect possible 1 hit-KO on H'aanit below Level 35.
He has 5 shields and weakness to "Sword, Axe, Bow, Ice". Can defeat him with H'aanit at level 32 or below with the following: equip H'aanit with high evasion shield, armor & accessory "Gustav's Shield, Silent Bandana, Silent Cape, Enlightening Bracelet".
Use the following Monsters for Provoke: to constantly break his shield