You see Planestrider
Notes
It looks like a cyborg face. When its health gets below 80%, it loses its nose and looks like this:
It's a boss of the Opticording Sphere Quest.
Abilities
Summons (1-3 Lost Ghost Of A Planegazer)
, and more.
Damage Taken From Elements
Physical
Death
Holy
Ice
Fire
Energy
Earth
Location
Inside The Cube (Location)
Behaviour
It doesn't move. Planestrider never retreats.
Strategy
Stand at a distance and attack.