Talk:Vauban (Warframe)/@comment-82.128.184.219-20140114085122/@comment-49.144.210.231-20140115094754

^ i think what his problem is that he lost a skill mod(s) of his Vauban. maybe to fusing or transmuting.

to the OP: try doing Derelict survivals or defenses. i vaguely remember which monster drops it, but it's definitely from the Infested.