Envious Blade

Envious Blade is a Legendary dagger in Diablo III. It requires character level 12 to drop, and can only be found in or  Horadric Caches.

The special affix makes it extremely deadly against lesser enemies when the players has potent non-channeled abilities (and provided they do not have or permanent life drain from enemies around like Bul-Kathos's Wedding Band), but against bosses and elites, it is mostly useless.