The HoloEN Halloween (HolowEN, if you will) stream only happened a few hours ago by the time of this image. This is Kronii's VRChat model. To be fair, there were some preview images, but I don't think anyone thought this would become a reality.
...Just imagine if someone mad enough to put out a combined Kronii & Miko mod for Minecraft's Ghast. Not just the neverending "Nyahallo", you can enjoy the incessant "GWAK!" when you traverse the Nether.