Invoke is a system that allows you to purchase items, specifically consumables, from the Shrines in Wuchang: Fallen Feathers at the cost of it increasing your Madness. It trades your sanity, and will fill up the Madness meter will gradually fill up as you purchase more items.

WUCHANG: Fallen Feathers is developer Leenzee’s debut, and it’s an impressive adventure to say the least. Playing as Wuchang in the disease-stricken land of Shu, where a mysterious illness known as the Feathering is inflicting inhabitants – including Wuchang herself – with the growth of feathers and violent tendencies,