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Caustic Sprawl is a Codex featured in Tom Clancy's Rainbow Six Extraction. It is unlocked by completing the Keep It Clean Study in the San Francisco Region.

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Caustic Sprawl Codex

INDEX Analysis:
Appears to be a more dangerous variation of typical Sprawl colonies found in a Chimera-infested environment.

Caustic Sprawl colonies secrete a cocktail of extremely corrosive chemicals. Typical viscosity also inhibits movement through the Sprawl. Result is continuous damage while in contact with caustic colonies. (INSERT: Rook - It will eat right through armor. Just stay away from it.)

Complete chemical breakdown is yet to be determined. Spectrographic analysis is inconclusive. Returns multiple unknown elements. (INSERT: Mira - I've never seen or heard of anything like them on Earth.)

EXTRAPOLATIONS:
Caustic Sprawl cell analysis reveals a significant variation in structure from typical Chimera Sprawl. Mechanism for the synthesis of such a wide variety of compounds is unknown. Implies complex chemical signals approximating neural pathways. INCONCLUSIVE.

ENGAGEMENT PROTOCOLS:
Avoid extended periods of contact with Caustic Sprawl.

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