Nuckelavee

The Nuckelavee (nuck-eh-lah-vee) is a creature added by the Death Will Come mod.

In Mythology
In Orkney(Scottish island) mythology, the Nuckelavee was the most feared and horrible of the fairies. It came from the sea and infects livestock with the plague, and burns crops with the one flaming eye on the horse's head. It also has no skin, as well as black blood with yellow veins. It could only be stopped by fresh water, as that is poisonous to it.

In the Mod
In the Death Will Come mod, the Nuckelavee is a hostile mob. It can open it's mouth and shoot poison potion particles. If these particles touch you, you will be poisoned. It can also shoot fireballs from its horse's eye. The player can throw it in pure water which will kill it instantly, this being the ONLY way to kill it. If you can kill it, you will be presented with great rewards.

Mouth of Poison
The Mouth of Poison appears to be the creature's mouth, you can poison mobs with it in your hand.

Eye of Fire
The Eye of Fire appears to be the only eye the horse has, you can shoot fireballs with it in your hand.

Black Blood
Black Blood appears to be a bottle of the creature's blood, you can heal with it in your hand.

Yellow Vein
The Yellow Vein appears to be one of the creature's veins, it currently does nothing.