Partial Set Bonus
Magic Damage Reduced By 15 (2 Items)
+200 Defense (3 Items)

Complete Set Bonus
+3 To Assassin Skill Levels
+350 Defense
14% Life Stolen Per Hit
14% Mana Stolen Per Hit
All Resistances +50
Damage Reduced by 30% (Awesome!)
Magic Damage Reduced By 15
Fade*

*The Natalya's Odium fade ability turns the Assassin Ethereal in appearance once she has completed this set. This has no gameplay impact beyond looking very cool and making other players jealous.