The Core Temple of Central Order was built on the space fortress Avalon from the Age of the Great War. It was a floating fortress with a Nova-Class black hole engine which fought against tens of Blue Flowers and billions of Beasts hundreds of years ago.
When E-34 took over the Core Temple she replaced Avalon's missing parts with bionic parts, capable of replicating the original functions. By using the fortress' capabilities and the energy, thousands of High Rank Beasts could be mass-produced not from a surrogate womb but a Plant, along with tens of Blue Flowers.
Appears in ME0-Ch67.