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'''Fibrous Taint''' is a block from [[Thaumcraft 5]]. It can be found in [[Tainted Lands]] Biome, or is spawned randomly by the decay of [[Flux Goo]].
'''Fibrous Taint ''' will spread if there is [[Vitium]] in the aura, growing onto blocks, and converting them into their tainted variants. It will convert [[Dirt]] and dirt like blocks into [[Tainted Dirt]], Stone and other rocklike blocks into [[Tainted Rock]], [[Wood] into [[Taintwood Log]] and [[Leaf]] blocks into [[Crusted Taint]]. Each of these tainted blocks can spawn more [[Fibrous Taint]] and, with the exception of '''Tainted Rock ''', acts like '''Fibrous Taint ''' and can taint adjacent blocks.
As Fibrous Taint spreads, it converts the area its in into [[Tainted Lands Biome]], but the Tainted Lands Biome itself does not spontaneously generate Fibrous Taint or taint any blocks.