Very striking and moody, love that you reserved all 4 colours for the head piece and went full 1bit for the body/chest. Some artists would be tempted to highlight the chest just a little, maybe even adding a little bit to the buttons but I believe forgoing this resulted in such a strong composition.
Truly puts the focus on the middle of the canvas, coupled with the wonderful lighting on the tendrils from the glowing core. Phenomenal.