The Murderer in the dark is a Nightmare Mode monster that spawns on surface. Its speed should not be underestimated. It attacks by contact and throwing bloody knives. The throwing speed gradually increase as its health goes down. It inflicts Nightmare (Debuff)
It appears to be a small boy with a red and white mask on riding a tricycle.
Attack: 50 (Contact) 100 (Knives)
Knockback resistance: 50%
The Saw (50%)
Reverse bear trap (5%)
The name is a reference to the game Murderer in the dark.
The look and drops are a reference to the Saw franchise.