He is a Minecraft creature that haunts down players whit the boomerang like weapons in his hands and when he gets annoyed or cannot be able to haunt the player he was after some extra eyes appears on his face and if this not works he grows mantis like extra arms from back if his shoulders if you get hit by this arms you get some effects that is;

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  Nausea

• Poison

• Slowness 3

• Miner Fatigue 3

• Bleeding 4

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Also the Boomerang weapons gives the players effect of "Flare" ya know that one potion that makes players seen through walls or far distance yeah that one so Nightrunner can spot you easily whit this!