Time to see some weird bosses.
HYDRA (SHINOI 3: RETURN OF THE NINJA MASTER)
The third boss encounter in Shinobi 3 against Hydra, also known as the Body Weapon, is a decidedly memorable one. Hydra is, essentially, a mass of dumped biological weapons. These failed bioweapons were dumped into sewers, which were full of acid, but somehow managed to adapt to their surroundings, and turn into this pulsating, throbbing, creepy-looking blob of veins, tentacles, eyes, and bulbous biological material.