Max's glowing eyes stared straight ahead as the last of his repressed memories flooded into his mind. He now knew what the secret to Gloriana was. A God Class Mecha couldn't be made, at least not in the conventional sense. They were not just mechanical constructs, they were infused with the essence of the Energy Beings, which allowed them to move freely between layers and regenerate themselves as long as there was energy available to regenerate with.
But as a mechanical construct, they weren't limited to just the life essence of other members of their species to quickly regenerate. They could absorb the energy from Warp Drives, Fusion Cores, and even incoming weapons fire.
That was why they were viewed as indestructible. The enemy had always tried to use energy weapons against them when the design fed on energy. Everything that you gave it, it could use to heal itself, then fire the remainder back at you without depleting its own reserves.