The Beast of the Sewers is part of the Prison Break main quest. It involves going into the Sewers and killing a Cockatrice. You’ll begin at location (#1) and the Cockatrice will appear at either location (#2) or (#3). After killing the beast you can make your way out of the Sewers and back to the Temple Quarter from location (#4). It’s really an easy battle and the Cockatrice can be killed with a single strike by casting the Aard Sign first to stun the creature. Bring the head back to Vincent to secure your freedom.

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