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 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-Level Beasts could be mass-produced not from a surrogate womb but a plant, along with tens of Blue Flowers.
Appears in (Ep 0 - Ch 67).