Sub-race: Pokhrazadi

Lovers of the Underground; the Elder, Heirs to the King of the Whole Underworld: If you are in the Halls of Pokhrazad, so long as you have once been at the beginning location of your journey and been at the end-point location of your journey, you cannot become lost along the way. Furthermore, if you fight a Dragon in the Halls of Pokhrazad, then you have advantage on all saving throws against the dragon's breath weapons. Lastly, if you happen upon an underground waterfall in the Halls of Pokhrazad, then you regain all expended Hit Die; you cannot use this feature again until you finish a long rest.

Heralds and Harpers: You have proficiency with an instrument of your choice.

Stubborn and Fast in Friendship: If an allied creature is reduced to 0 hit points when within 5ft of you, you may expend a reaction to bolster them, and they will be reduced to 1 hit point instead. You can't use this feature again until you finish a long rest.

Histories Carved for 10,000 Leagues: Whenever you make an Intelligence (History) check related to the Dwarrow, you can add twice your proficiency bonus, instead of the proficiency bonus you would normally apply.

Languages. You can speak, read, and write Common (Juraedon) and Dwarrowish (Local Dialect: Pokhrazad). Pokhrazad is a secret tongue that all Pokhrazadi are loathe to spread. It is only ever spoken softly, but carries a great distance. Its sound is as the trill of water rushing downwards over stones; or as the echo of a harp string being plucked over wide chasms.