This tactical dagger was forged from the tooth of a Megamouth Shark 🦈, a deep-sea predator genetically modified by the "Abyss Guard" naval unit to grow into a blade. The serrated edges mimic the shark’s natural teeth, designed to tear through fabric, flesh, and even underwater armor. The hollowed-out groove in the blade channels a bioluminescent venom extracted from the shark’s glands, which glows with a faint blue light and causes intense muscle spasms. The honeycomb-patterned handle is carved from the shark’s vertebrae, providing a secure grip even in wet conditions.

However, the weapon carries the shark’s primal instinct. Its DNA, preserved in the tooth, occasionally reactivates, causing the dagger to vibrate when near blood and emit a low, ultrasonic hum that mimics the shark’s hunting call. Those who wield it for more than a week begin to experience vivid hallucinations of the deep ocean, and their skin develops a scale-like texture that retains moisture. Worse, the venom can seep through the handle’s pores, poisoning the user if they grip it for too long. During a 2309 underwater raid, a soldier using the dagger accidentally poisoned himself, drowning when his muscles seized up.

The dagger was decommissioned by the Abyss Guard, but it was stolen by a pirate crew who used it to hijack cargo ships in the Atlantic. Today, it circulates on the black market, where it is known as the "Shark Tooth." It is said that only those who can tame the shark’s hunger can wield it without being consumed.