Reeferman Genetics Black Willy CUP WINNER for THC + CBD! It's true. As far as we know, it's the only strain to hold a Cup for Best THC & CBD Category. How's that?! Stellar breeding and selection allowed us to offer two different selective genepools resulting from the same starting point in this breeding program. Black Willie is a Vietnam Black hybrid, and is a building block in many of our other Reeferman Hybrid Strains.