Origin of Darkness x Cascade Imperial Sour Stout (500ml)Style: Imperial Sour StoutBrewed by: Collective Arts Brewing Collaboration with Equilibrium Brewery Hamilton, CanadaABV: 8. 5% Cascade Brewing x Collective Arts Origin of Darkness Oak Barrel Aged Sour Stout and conditioned on Ontario peaches. This Imperial Stout is aged in local Niagara red wine oak barrels with mixed cultured yeast and bacteria for over a year, we then conditioned it on freshly harvested, locally grown, juicy Niagara peaches.