Black Knife Assassin

Feint Attack. When the Black Knife Assassin attacks with her dagger, it has advantage (cannot be used with Slashing Blade of Death or Jumping Blade of Death).

Bleed Level. The Black Knife Assassin cannot be bled.

Dagger. Melee Weapon Attack: +13 to hit, reach 5 ft., 1 target. Hit: 12 (3d4 + 5) Slashing + 7 (3d4) Radiant damage. 

Slashing Blade of Death. Ranged Magic Attack: +10 to hit, range 60 ft., 1 target. Hit: 12 (3d4 + 5) Radiant damage. The target must make a DC 18 Con save, taking an extra 7 (3d4) Radiant damage. The target must repeat the save at the end of each of their turns, taking 7 (3d4) Radiant damage until a save succeeds.

Jumping Blade of Death. Ranged Weapon Attack: 40 foot cone, Dex save. All creatures within the cone must make a DC 18 Dex save, taking 12 (3d4 + 5) Radiant damage on a fail (half as much on a success). The target must make a DC 18 Con save, taking an extra 7 (3d4) Fire damage. The target must repeat the save at the end of each of their turns, taking 7 (3d4) Fire damage until a save succeeds.