Most Deumbralite are Ageless and they can't truly be killed but might choose to pass on at some point. Once the human age of 21-25 is reached, Deumbralite normally stops aging at this point, however, this doesn't mean that cannot choose to appear older.

When determining your character’s ability scores, increase one of those scores by 2 and increase a different score by 1, or increase three different scores by 1. Follow this rule regardless of the method you use to determine the scores, such as rolling or point buy.

The “Quick Build” section for your character’s class offers suggestions on which scores to increase. You’re free to follow those suggestions or to ignore them. Whichever scores you decide to increase, none of the scores can be raised above 20.

You are medium for the reason of "human-like form" that you shift in and out of.

You Harden your shadows to form a body as well as harmless items or trinkets.

Your base walking speed is 35 ft.

Deumbralite doesn't need to sleep. Instead, they rest similar to elves, but prefer meditating in darkness, for 3 hours a day.

You can move through any opening the size of 1 inch wide without squeezing.

You gain racial proficiency in Arcana, Insight, and Stealth.

Being a Deumbralite, similar to a Shadow, it is hard to hurt you with normal attacks. you have resistance to Acid, and Bludgeoning, Piercing, and Slashing from Nonmagical Attacks, immunities to Necrotic, and Poison, and vulnerability to Radiant damage.

Lastly, you are immune to these conditions: Grappled, Petrified, Poisoned, and Restrained.

You have superior vision in dark and dim conditions. You can see in dim light within 60 ft as if it were bright light, and in darkness as if it were dim light. You unlike most with this ability can discern color in darkness, not just shades of gray.

You roll advantage when rolling acrobatics, while not it direct sunlight.

You can willingly move through other creatures and objects as if they were difficult terrain. You take 1d10 Force Damage if you become Corporeal while inside a physical Object and is forced to the nearest open space outside of the object.

Once a day, as an action, you can change your appearance and your voice. You determine the specifics of the changes, including your coloration, hair length, and sex. You can also adjust your height and weight, but not so much that your size changes. You can make yourself appear as a member of another race, though none of your game statistics change. You can’t duplicate the appearance of a creature you’ve never seen, and you must adopt a form that has the same basic arrangement of limbs that you have. Your clothing and equipment aren’t changed by this trait.

You stay in the new form until you use an action to revert to your true form or until are rendered unconscious.

A Deumbralite of 4th level or higher can vanish from his current location and reappear in any shadowy area within double walking speed away. This is a move-equivalent action.

While in dim light or darkness, the Deumbralite can take the Hide action as a bonus action.

Deumbralite are difficult to hit in shadow, and as a result, gain a +2 to their armor class while in darkness. Cannot bypass an AC of 18.

A Deumbralite's innate spellcasting ability is Charisma regardless of class. (spell save DC 8+ Proficiency Bonus+Charisma Modifier). A Deumbralite can innately cast the following spells, requiring no material components:

At will: Mage Hand, Minor Illusion.

3/day each: Detect magic, and Detect Thoughts.

1/day each: Fly, Invisibility, Charm Person, and Suggestion

All of your character's weapons are transformed into shadows and absorbed into your body's shadow realm allowing you to summon them as a sheathing and unsheathing action.

You are able to use your shadow realm to store anything within you similar to the way your weapons are stored but with this, you can change them back. The limits of which are at DM's discretions.

You'll reveal a set of fangs in which you'll need to perform a Melee Weapon Attack to hit within the reach of 5 ft on one willing creature, or a creature that is grappled by you, incapacitated, or restrained. If successful, roll to Hit: 7 (1d6 + DEX Mod) piercing damage plus 7 (2d6) necrotic damage. If the target is humanoid, it must succeed on a DC (8 +proficiency bonus + Charisma Modifier) Charisma saving throw or be charmed by you for 1 minute. While charmed in this way, the target is infatuated with you. The target's hit point maximum is reduced by an amount equal to the necrotic damage taken, and you regain hit points equal to that amount. The reduction lasts until the target finishes a long rest. The target dies if its hit point maximum is reduced to 0.

This ability is to regain Hit Points through the Consumption of the Targets Blood, however, if Blood is not available, energy will be drawn from the Target's Soul as an alternative.

No Draining effect will apply for constructs. The draining effect will apply to the undead if the soul is present within the body.

As a Deumbralite, you are incapable of proper death. Once killed, after the span of 24 hours, you will respawn in a manner of rapid regeneration or manifesting a new existence.

This ability neutralizes any poisons and cures normal diseases afflicting the creature when it died. It doesn't, however, remove magical diseases, curses, and the like; if such effects aren't removed prior to casting the spell, they afflict the target on its return to life. This spell closes all mortal wounds and restores any missing body parts. Coming back from the dead is an ordeal. The target takes a −7 penalty to all attack rolls, saving throws, and ability checks. Every time the target finishes a long rest, the penalty is reduced by 1 until it disappears.