IRONSKIN BLACKROCK

Guardian of 'Ring of Ether'

Because the Ether Fortress itself is a secured place powered by mysterious force stone, it was well protected from invaders.
Among the monsters that were guarding the fortress, three of them became the boss of each group to guard treasures hidden
in the fortress. Ironskin Blackrock is predicted to be a mutated Cru'el, and is guarding the Ring of Ether.