Fallen Kingdom; the Broad, To Be Ascendant: If you are in the One-Mansion, 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 Green Dragon in the One-Mansion, then you have advantage on all attacks and saving throws towards and against that Green Dragon. Lastly, you have advantage on Charisma (Persuasion) checks towards or against Giants.
Instruments of State: You can set your lips against and play the great horns that curl around the peaks of the Western Mountains.
Superior Darkvision: Your Darkvision has a radius of 120 feet.
Das Resilience: You have advantage on Saving Throws against illusions and against being Charmed or Paralyzed.
Das Magic: For 1 minute, you may magically increases in size, along with anything you are wearing or carrying. While enlarged, you are Large, doubling your damage dice on Strength-based weapon attacks, and make Strength Checks and Strength Saving Throws with advantage. If you lack the room to become Large, you attain the maximum size possible in the space available. If you end this feature before 1 minute is up, you retain the leftover time for later usage and can use that leftover time freely. Once the minute is up, you cannot use this feature again until you finish a short or long rest. A long rest recharges this feature even if there is leftover time. At level 6, the total time given increases to 2 minutes. At level 11, the total time given increases to 3 minutes. At level 16, the total time given increases to 4 minutes.
Once you reach 5th level, you may also turn magically Invisible until you attack, cast a spell, use Enlarge, or until your Concentration is broken, up to 1 hour (as if concentrating on a spell). Any Equipment you wear or carry is Invisible as well. You cannot use this feature again until you finish a short or long rest.
Growing to Gianthood: You have disadvantage on Attack rolls and on Wisdom (Perception) checks whenever you are not using the 'Das Magic' feature and in an Enlarged state.
Languages. You can speak, read, and write Common (Juraedon), Giant, Dwarrowish (Public Das), and Dwarrowish (Local Dialect: Belchara). Das is the public tongue of the Dwarrow of the Das, and they use it to speak to outsiders. Belchara is a secret tongue that all Blue Dwarrow are loathe to share. It is only ever spoken softly, but carries a great distance. Its sound is as the clatter of turning pages; or as the peal of thunder.