Araj Oblodra

Araj Oblodra is a drow trader encountered in Moonrise Towers. Other than the items she sells, she also asks to speak with Astarion, and offers you a potion in exchange for a sample of your blood.

Speaking with Astarion

When you bring Astarion to speak with her, she asks him to bite her so that she may study the effects of vampire bites up close. She offers a Potion of Everlasting Vigor in exchange, which permanently increases the Strength of the one drinking it by 2. Astarion does not wish to do this, because there is something wrong with Araj's blood, but he will do it if you ask him to, no ability check required (although he does disapprove).

Blood for Potions

Araj offers potions in exchange for True Soul blood. With a DC 14 Intelligence (History) check, you can determine that she wants Illithid blood rather than True Soul blood specifically, and if you reveal what you know of her intentions she'll up her offer to 200 gold along with each potion.

Each character may give blood once, taking a small amount of damage. The potion you receive depends on the race of the character giving the blood. As with standard elixirs, the effects go away when you take a long rest.

Race	Potion	Effect
Elf	Elixir of Elven Elegance	+10m movement speed, Darkvision, and immunity to Charmed
Dragonborn	??	??
Drow	??	??
Dwarf	??	??
Githyanki	Elixir of Githyanki Providence	Cast Misty Step, Invigorate Leap, and Blur once each
Gnome	Elixir of Gnomish Ingenuity	Sleight of Hand proficiency, cast Knock once
Half-Elf	Elixir of Half-Elven Healing	You and surrounding allies regain hit points equal to you Constitution score
Half-Orc	??	??
Halfling	??	??
Human	Elixir of Human Versatility	Proficiency in all skills
Tiefling	Elixir of Tiefling Vice	Cast Thaumaturgy, Hellish Rebuke, Burning Hands, and Flame Blade once each