Eyeless One
13
What to know
Eyeless One has 1,400 health.
It resists frost; spirit does nothing to it at all. Blunt, slash and pierce land at full damage, so that is what to bring.
Its hardest hit is claw at 100 poison, 80 blunt and 40 slash, out of 3 attacks.
Some of what it throws is elemental, so poison resistance is worth having.
Of everything craftable, 
Thunderblood Crossbow, 
Lightning Strike and 
Frostfire Crossbow put the most damage through what it resists.
It always drops 
Long Claws.
Spawn command
With devcommands enabled, this spawns Eyeless One in front of you. The third number is the level: 3 spawns a 2-star.
Creature ID: ElakingMole · all console commands and IDs