Occuli are a Daemic race.

Monoculus

Occuli start as a tiny larva called a Monoculus that attempts to cocoon itself in the heads of deceased humanoids, usually gaining access through the eye socket. The body the larva gestates in is animated while it is host. When it reaches maturity, it erupts from the skull of its host in the form of a binoculus.

Binoculus

Binoculi have two open eyes when "born" and a third eye that is not yet open. 

Trinoculus

A binoculus that matures to adulthood becomes a trinoculus, at which point all three eyes are open, the two smaller eyes extending from stalks. Trinocculi are also capable of creating larvae by shedding its eyestalks, which regrow in time.

Hectoculus

A hectoculus is a hideous amalgamation of monoculi joined in a particlar ritual.

Necroculus

A necroculus is the product of ten occulus spawn zombies that gather in a secluded place and meld together. The resulting creature is an empty eyed beast with ten tentacles made from the zombies spinal columns.