Old One Eye

Old One-Eye was a monstrous Carnifex mutation with gigantic pincers and a missing eye. The creature was found on Macragge centuries after Hive Fleet Behemoth was destroyed. Originally presumed dead, Old One Eye tore apart the ship transporting its body. Later the Tyranids persistently raided the system where it was left, suggesting it "called" the forces to it. Notoriously hard to kill, it had the ability to rapidly regenerate even apparently fatal wounds, which led some to speculate that it was a genetic experiment of the Hive Mind. Something of interest to note is that it failed to regenerate the aforementioned lost eye, the scar burned down to the bone. This could suggest some vulnerability to the thermally energetic, electrically charged combination natures of plasma weapons, the same weapons that caused the scar.

Some of its features now appear on the carnifex, suggesting its traits were later deemed useful, notably the giant crab-claws and regenerative abilities, although the "prototype" versions work differently than those of its "parent."

Old One-Eye was given a special model and rules in the Third Edition Codex.

It might be worthy of note that Old One Eye shares the name and some minor characteristics of the character One Eye from the novel White Fang.