I started playing TTK in December, as i got to lvl 40 on my newly made warlock i was able to get my hands on 2 Dvalin out of the 4 needed for the Sleeper Simulant quest. I got these 2 Dvalin in December and since then i got none. I know it's a completely random drop but getting none in 2 months is frustrating. Anything i can do?or is there something i may be missing? Only thing i remember is that i got both from Vex.