DNAvenger

DNAvenger is a perk in Fallout: New Vegas add-on Old World Blues achieved by completing the challenge Caza-Death Dealer.

Effects
Rank 1: 10% Damage Bonus against cazadores.

Rank 2: 20% (+10% + 10%) Damage Bonus against cazadores.

Rank 3: 30% (+10% + 10% + 10%) Damage Bonus against cazadores.

Behind The Scenes
This is probably (unconfirmed) a reference to an old anime named DNAngels as this add-on has other anime-related refrences.