I am Eyes. The Eyes emit a blue-purplish glow around the area they're about to spawn in with a moan, before appearing and dealing damage to players who look at them. Each time a player looks at them, they will deal some damage. The player has a second to look away before they die. To avoid the entity, the player must keep their head down and not look at the entity. You can kill them with a crucifix and they disappear when you open the next door.