You see a reflection of Obujos.
Notes
It's somehow related to Obujos and very similar to it in power.
Part of the Opticording Sphere Quest.
Abilities
Melee (0-1200 and 
starting up to 18 hp/turn)
Great Cloud-Energy Bomb (200-600)
Ice Beam (600-1300)
Eternal Winter Wave (600-1500)
Great Sudden Death Bomb (200-800) Distance Earth Attack (Assassin star/arrow) (0-800)
Sudden Death (Reduces Distance
by 60%)
Extremely fast Self-Healing (1000-2000+)Damage Taken From Elements
Physical 
Death
Holy
Ice
Fire
Energy
Earth
Drown
Location
Behaviour
Attacks at close range and runs at deep red hp.
Strategy
Treat it like you would with Obujos. You'll need a level 250+ Elite Knight to block it and must be careful with its combos. It retargets often, but you can trap it between the glass walls north of the room to stop it from moving, as long as the blocker can take the wave damages.