The Axial CorePlex functions as the center of the Yggdrasil Xeomn, which is a the computer network that runs the Yggdrasil Logorinth.  Here is a picture of the CorePlex that Skuld smuggled out when she, her daughters and her nieces journeyed inwards to the very center of the Yggdrasil Xeomn.  This picture had been rendered into Earthrealm-capable imaging technology as a courtesy to viewers by Skuld.