Homebrew Deep One Species Details

While deep ones have similar emotions and names to most mortal creatures, they are not mortal. The mad genius who remade them in their shells of iron and brass made it so that they can never truly die. After the course of ten years, quicker if near water, if the body is fully destroyed. The deep one is able to regrow and continue on as new, making them incredibly hard to fully kill. This does not mean they are invincible, they can get harmed as easily as any other species, only that they regrow the parts that have been harmed. The appendages outside of their casing are often the weak points and they can feel pain on a much larger scale than most. Dry areas are also very dangerous to them and try to stay as far away as they can from arid planes, the mere mention of deserts can send one shaking in fear.

No one knows what they originally looked like or where their home realm is, and asking one’s old enough to remember gets vague answers at best. What is known is that the war that spawned them is as horrific as it was ancient, that there were no winners, and that it destroyed their realm completely. It is also clear that whoever created them is worshipped as a god, only called the Old One. Deep one culture is very militaristic and focuses heavily upon naval operations and exploration of unseen worlds. There is also a rigid hierarchy of rank, primarily distinguished by ornamentation on their suits and medals on their uniforms. They are also honor based with high morals, but some things in their culture may be seen as horrific and disturbing to untrained eyes. Each deep one is grown in their cases, each unique to the individual, with artisans being one of the most respected professions in their species. This means that some have built in weaponry, equipment, and specialized tools that cannot be removed from the suit.

While most prefer to be secluded with their brethren in the deep dark depths of the oceans across the universe, they are not heartless. Many hold trinkets and keepsakes that give them a sense of true individuality. Some have been known to become great diplomats and inventors that have helped many adventuring parties in their quests to stop great evils. 

Deep One Traits

Deep ones are machines mixed flesh, they are able to use both of those qualities to their advantage

Regeneration

Starting at level 2, deep ones have matured enough to have fully regenerative flesh. With every group of 5 points of damage taken, there is the option of 2 points be retained. It has to be by 5 points, any less or any more until the next group of 5 will not go through. Regeneration does not work for saving throws. This rule applies to most forms of damage except necrotic, of which the creature cannot be healed. If on disadvantages to heals, creature can only heal by 1 maximum

Electrified Body

A thousand volts can run through the head of a deep one at any given time. They can use this great amount of electricity to charge into a single part of the body, to enhance and empower it.