Blood-Nap is a unique variant of the Bowie knife that does bonus critical damage, gives a bonus critical chance, and adds +10 to Sneak.
This weapon qualifies as an improved holdout weapon.
It is possible to executeBlood-Nap outside of V.A.T.S. (without the required Melee skill of 50 to perform the move) by initiating a power attack (hold attack button) while moving forward.
Found in The Courier's Mile. This weapon becomes accessible only after first completing The Launch. It is found sticking out of a street lamp just to your left as you enter the area.
The weapon's Sneak bonus will be shown as "Activated" when the weapon is equipped, in an on-screen message.
It is one of the few unique weapons to date with the same appearance as its non-unique counterpart.
It may glow blue in dark areas.
The weapon itself may sometimes disappear during the sheathing animation.
Blood-Nap does more damage and has a higher DPS than even Chance's knife, making this an extremely formidable single-handed bladed weapon.
Blood-Nap's Sneak +10 does not act as a bonus, but rather as a raise in Sneak, i.e., if your character has it equipped when he/she levels up, some perks that require a higher Sneak (say your character has 50 Sneak but wants to get the Mister Sandman perk without spending the 10 points) will be available.