Viy, the giant one-eyed demon, is the Guardian of the Inferno Cavern. He is a giant so large during the fight you only fight his eye and eyelashes.
- Guardian Number: 05
- Location: Inferno Cavern D-6
- Background Music: "In the Bottom"
- Viy's eyelashes fire small projectiles at the player.
- If you stand on Viy you will be knocked high into the air, dealing a large amount of damage.
- Two demons will lift Viy's eyelid and he will fire a large lazer straight-up, this will destroy anything that enters, including Sub-Weapons.
- Two demons will lift Viy's eyelid and he will shoot his eye upwards and fire lots of bullets randomly into the air, these will rain down on to the player.
- The eyelashes, these do not damage the boss but only stop the eyelashes from shooting projectiles for a brief period of time.
- The eye, but only when open.