Your Dexterity score increases by 1, and your Charisma score increases by 2.

Incubi and Succubi reach full maturity by the age of 18. They cannot die of old age.

Incubus and Succubus often tend toward evil alignments. Neutral or good Concubi are extremely rare, but not unheard of. They have no particular tendency toward or against lawful or chaotic alignments.

Concubi are about the same size and build as humans. Your size is Medium.

Your base walking speed is 30 feet, you also have large bat-like wings, which give you a flying speed of 60 feet. You only have a flying speed of 60 feet if you are in your true form, and if you are wearing light armor tailored to your wings. If you are wearing medium armor, your flying speed is 30 feet. You cannot fly wearing heavy armor.

Thanks to your infernal heritage, you have superior vision in dark and dim conditions. You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can’t discern color in darkness, only shades of gray.

You have resistance to fire and poison, but vulnerability to radiant damage.

A creature of deceptive words, Concubi have proficiency with Persuasion and Deception.

You are able to cast charm person as a 1st level spell once with this trait, does not cost a spell slot, once per long rest. You may also cast fear, as a 3rd level spell, once with this trait, does not cost a spell slot, once per long rest.

You can use your action to change into a medium humanoid form, or back into your true form. This form can mimic any normal humanoid, such has humans, orcs, tieflings, and elves. Without wings, you lose your flying speed. Other than your size and speed, your statistics are the same in each form. Any equipment you are wearing or carrying isn't transformed. You are considered to be a Shapechanger or a Shapeshifter for the purpose of spell effects.

If you die, your corpse reverts back to its natural form.

When in your humanoid form, you are considered humanoid; when in your true form, you are considered a fiend. Certain spells and effects that specifically deal in detection will always count you as a fiend, these include Detect Evil and Good and a Paladin's Divine Sense.

You drain the life from those you embrace. The target must make a Constitution throw contested against your charisma spell save dc, taking 1d8 + your Charisma modifier necrotic damage on a failed save or half as much on a success. You gain a number of temporary hit points equal to half of the damage dealt rounded down. If the target fails the save, The target's hit point maximum is reduced by the number of necrotic damage. The target dies if this effect reduces its hit point maximum to 0. You can use this special attack a limited number of times per day equal to your proficiency bonus.

The damage of Tempting Embrace increases by 1d8 when you reach 5th (2d8), 11th (3d8) and 17th (4d8) level.