The mace was added in Patch 4.0.3. In Patch 4.0.6., it was changed to Bind on Pick-up - which was then reverted in Patch 4.2.0.
Oggleflint was removed as a boss in Patch 5.0.4. It is unclear if this item was reassigned to another mob's loot table. It is possible to purchase the weapon through the Auction House.
At this time, this item's appearance cannot be used for transmogrification. For transmog alternatives, see: Sin'Dall's Femur and Ebony Boneclub. Basilisk Bone is transmogrifiable but it is an off-hand frill.