Ophidian

Ophidians are monsters from Heretic that resemble snakes and carry pointed staffs. When attacking, they fire a chain of three purple shots from their staff, pause, and then fire a red fireball. Ophidians sometimes drop a Flame Orb when killed. These particular Flame Orbs are worth 5 shots instead of the usual 1 shot.

Some source ports refer to the Ophidian as "Snake" or "Serpent".