This is part 18 in IGN's walkthrough for the story missions of Far Cry 3.
Still in search of the ancient knife, Jason returns to the underground - this time via the cenote in the center of the norther island. After leaping into the water below, he climbs into a cave and enters an underground temple - the final resting place of the emperor Lin Cong. After fighting his way across sulfuric underground springs, Jason finds the knife, still clutched in the hands of it's owner. He takes it, triggering another booby trap, and barely escapes with his life. He is surprised, however, not to find Buck waiting for him when he emerges from underground.
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