This strain lives up to its perilous name, delivering wickedly potent THC levels that top 24% in some tests. That puts Black Widow on a very short list of the strongest marijuana strains of all time. With sativa-dominant genes (sativa/indica ratio of at least 30:70), this strain provides an exceptional head high with remarkably intense euphoria, powerful happiness, deep relaxation, and a major case of the munchies.