Mother all of them just in case..
I heard of people getting like 10 packs of seeds and growing all of them to find the BlueBerry Muffin pheno, it really is something special.! I am growing a BM (BBM pheno) x Nevilles haze hybrid now, need more time to know how it will turn out.
I kick myself for losing the clone, I was not an exp grower at the time.. As I recall, it looked more like a blueberry x skunk hybrid but it was SUPER sweet and no gassy skunk smell at all. I got 3 phenos, the most common was the NL pheno. It was slightly berry, giant flowers, and great resin. It grew like NL, fat and round flowers. The second most common pheno was the actual BlueBerry pheno, this was smaller and dense purple nugs, sweet/earthy smell, and a stronger blueberry taste. The least common pheno was the BBM and it grew lighter and fluffier, longer flowers which looked more skunk but didnt smell skunky, it smelled liked the sweetest BlueBerry smell ever!.. My g/f at the time didn't smoke cannabis and hated it but she took one smell of the BBM pheno and her eyes got big, looked at me, and she said, "MMMMMM".... ..I know she wanted a toke after that.. lol.. she chickened out later..
Moral of the story, most will be the large NL type flowers but a little sweeter. I think Mau from Nirvana used a BlueBerry clone(FEM) and also used a NL male as well as a SK#1 male, as well as a Purple Kush male. Blue "Mystic".. go figure..
....Keep your eye out for the BBM pheno, it`s insanely sweet!