You are able to eat the food and water of the Shadowlands without risk, have advantage on saving throws against the powers and abilities of Lost creatures, and do not suffer the usual penalties for taking a long rest in the Shadowlands.

Your whiskers can detect airflow changes, letting you sidestep attacks seemingly before they are thrown. Increase your AC against opportunity attacks by +2.

You have advantage on Wisdom (Perception) checks that rely on hearing or smell.

You can run on all fours at impressive speeds. By spending a bonus action, you can drop onto all fours to skitter. You can wield only a single one-handed weapon, and your base walking speed becomes 40 feet. You also gain a climb speed of 40 feet. You can stop skittering by spending a bonus action to stand back up onto your hind legs.

Choose one ability score to increase by 2, and another to increase by 1.

Nezumi mostly live only a decade or two, though some examples show them living nearly a century.

Nezumi are on average short and slight compared with humans, ranging from three to five feet tall in most cases. You are Small.

Your base walking speed is 25 feet.

You can speak, read, sign, and write Common, Rokugani, and Undercommon.