Pickman’s Blade from Fallout 4 Best Melee Weapon
The blade actually has two distinct abilities. The first is its Wounding effect, which causes targets to bleed for an additional 25 points of damage. The second is a pre-equipped stealth blade mod which deals an additional sneak attack damage multiplier of 0.6, as well as causing targets to bleed for an additional 10 points of damage over the course of 5 seconds. This stacks with the weapon's legendary modifier for 35 points of damage from bleeding per hit, and bleeding effects currently stack per hit, making this an extremely effective melee weapon even against higher level enemies later in the game.