The buds of the klagûllu, a tall shrub related to hazelnut and shanku (see Alshana), native to semiarid to temperate scrublands and shortgrass prairies. Both its late winter buds (called klagûl), which had to be be brewed into a tea, and its edible autumn nuts (called Marku) contained an enchantment which gave the user Infravision.

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