The four-inch reinforced iron blast doors at the far end of the lower gallery groaned under the weight of catastrophic internal impacts.
Deep dents bulged outward through the heavy steel plating, each successive blow warping the metal as red-hot rivets popped from the granite ceiling and clattered loudly across the wet floorplates.
The five members of Squad 25 in the lab immediately dropped into a tight hexagonal defensive formation, their blades drawn and glistening under the red runes while their boots braced against the violently vibrating floor.
"Whatever is behind that gate has the physical strength greater than the big cats my father keeps," Kaka warned, locking his heavy tower shield into the steel grating as his jaw set in iron resolve.
"Just like you," Kiuga whispered loudly, and Kaka grunted in disapproval
With an ear-splitting shriek of tearing metal, the massive hinges finally snapped, sending the two-ton iron door flying fifty paces across the chamber.
