Your character knows at least three languages: Common plus two languages you choose from. One is usually the planar language your Incubus is from. Knowledge of a language means your character can communicate in it, read it, and write it. Your class and other features might also give you languages.

An incubus also has Telepathy out to 60 ft.

Incubi are unnaturally desirable, and most creatures of any species, gender expression, or sexuality, are prone to attraction and enchantment by these creatures. You roll with advantage on all charisma ability checks.

The love of a fiend is as painful as their claws. With a creature either willing, charmed, or grappled, an Incubi can turn lust into a weapon. As a bonus action, "with a kiss," you devour the life force energy from your victim. The target takes 3d6 necrotic damage, and you regain hit points equal to half the amount of necrotic damage dealt. Once you've used this ability, you can’t do so again until you finish a Long Rest.

When you reach 5th level, you begin to regain a part of your planar travel, that all incubi have naturally. In a flash of brimstone and flame, you teleport up to 30 feet to an unoccupied space you can see. You can use this trait a number of times equal to your Charisma modifier plus 1, and you regain all expended uses when you finish a Long Rest

You gain a +2 to charisma, and +1 to another ability of your choice.

Your body is made of hellstuff. You know the cantrip Fire Bolt, and can cast it at will.

You see in all kinds of darkness. You can see normally in natural or magical darkness, up to a distance of 120 ft.

You are a Fiend, but no longer a native of the Lower Planes. You are immortal: age will not effect you. You have strong retractable claws, and gain a natural claw attack.