From Blood Wiki
chapter one in Blood II: The Chosen, the only time it appears in the game. It appears in the basement of the Cathedral and, due to its large size, is immobile. It attacks by throwing spines from its back, firing lasers, and causing rocks to fall from the ceiling. There are alcoves in the wings where a player may hide and gather power-ups. If the player tries to fight the Naga face-to-face, it will pound the ground, releasing a shock wave causing massive damage.