Gith (Githyanki)
You learn one language of your choice and you are proficient with one skill or tool of your choice. By projecting you consciousness into the astral plane you can access a reservoir of experiences left by entities connected to your people. Whenever you finish a long rest, you gain an additional proficiency in one skill of your choice and with one weapon or tool of your choice. These proficiencies last until the end of your next long rest or until you gain a level of exhaustion.