This strain was originally a cross between Puerto Rican and the A-strain. However, the Great White Monster Cubensis was born out of accidental exposure to quaternary reactive ammonium siloxane. This is a special strain as it is the only P. Cubensis strain known to have both albino and leucistic spores. The fruiting bodies of this magic mushroom are white like albino shrooms but it is in fact leucistic (partial loss of colour pigmentation). The GWM is also known to have large fruits, slow to grow but prolific grower.