Homebrew Enderian Species Details

Enderian are tall black humanoids that have been around since way before the Convergence. A highly intelligent people who dwell in the far reaches of the void, which most call "the End" or "the End of the Void".  They are almost always confused with their more primal relative species called Enderman, but are far more advanced them them. They usually inhabit the world Cah'resh and are a peaceful people unless provoked. Similar to the Enderman however they are harmed by water and have the ability to teleport short distances.  Their weakness to water is derived by their ancestors being the Far-landers who came to inhabit the End many centuries ago, having to adapt their bodies to survive on the waters of Cah'resh which were tainted by the raw void energy of the planet.  This made the regular water of the worlds like Avalorne and others toxic to them and will harm them. 
Many centuries ago the first of the Far-landers who inhabited the End found a wounded Void Dragon, named Kaelli, to which rather than attacking the wounded dragoness the Far-landers gave her aid and nursed her back to health. After she was fully recovered, Kaelli transformed to a humanoid form that was more like the Enderians you see to this day. To the Far-landers she was as close to a Goddess they could get. As a token of her gratitude she blessed them, changing their bodies to be more fit for the harsh environment of the End, which granted them the ability to teleport around the End and the rest of Cah'resh. 
When the Convergence happened, the End suddenly shook as the Void Lords corrupted Kaelli and changed her into the Ender Dragon we know today. Most of the Enderian people fled but any that stayed were twisted into the primal and monstrous Enderman we see today which roam the planes, attacking when stared directly in the eyes. The remaining Enderians moved closer to the other civilizations of Cah'resh, the main populous being closer to the capitol of Cah'resh, Annistaria, Jewel of the Void.

Enderian Traits

Enderians are the inhabitants of the End of the Void so their abilities have a hint of the void along with their blessing from Kaelli to teleport.

Ability Score Increase

Your Intelligence score is increased by 2 and your Dexterity score is increased by 1. 

Size

Enderians range from 4 feet to over 8 feet tall and have very slender builds. Your size is Medium.

Age

Enderians come from the edge of the void, where time is not a concept to them, thus making age not one either. Their age is determined by their age and maturity of body structure. Males will have a stockier build and be taller than females when they are aging. Females will be smaller than males but will have different bodily features than males, their build stays slenderer than males and have longer hair than them. 

Speed

Your tall legs make you faster than most in your strides, your base walking speed is 35 feet.

Hydro allergic

Your body is adapted to your home climate and the waters of Cah'resh and not to the water of other worlds, making the other forms of water toxic to your body. When consuming water that is not from Cah'resh and entering water you are dealt 1d8 acid damage. While standing in water you are dealt 1d8 Acid damage for as long as your are in the water. 

Darkvision

Accustomed to the darkness of the Void and the outer-reaches of space you have superior vision in the dark conditions. You can see in the dark 120 feet as if it were bright light. You can discern color in darkness. 

Blessing of the End

You have the ability to teleport yourself to any unoccupied space you can see within 30 feet of you. This counts as a reaction to getting targeted as well and can be used as a reaction in combat twice per short rest.

Scare Tactics

Enderians, much like Enderman, can open their jaws making the long screaming visage that most fear when coming into eye contact with an Enderman. You have proficiency in the Intimidation skill.

Languages

You can speak, read, and write Common and Enderian. Enderian is an ancient language that have intricate grammar while also using Enderian runes which is a commodity to have a book or tablet with them.