race features:
Size. Mouselings stand around 3 feet tall,
appearing slightly taller with their large ears, and
normally weigh no more than 40 pounds. Ratlings,
by contrast, stand almost 4 feet tall but have much
smaller ears.
Darkvision. Mousefolk have superior vision
in dim light and darkness. You can see in dim light
within 60 feet of you as if it was bright light, and
darkness as if it was dim light. You can’t discern color
in darkness, only shades of gray.
Lightfooted. You have proficiency in the
Stealth skill.
Scurry. You can move through the space of any
hostile creature as if it were difficult terrain.
Squeeze. You suffer no penalty for squeezing
into a space that is only large enough for a creature
that is one size smaller than you.
Subrace.
Mousefolk are commonly divided
into two subraces: mouselings and ratlings. Choose
one of these subraces.
Mouseling
Mouselings are smaller than their ratling cousins
but all the more daring. They sport a wide variety of
coats, from grey to brown to very rare whites, but
all possess large ears and round, black eyes. Though
these features often make them look adorable to big
folk, most mouselings want nothing more than to
be taken seriously. They fancy themselves knights,
merchants, minstrels, explorers, and a wide variety of
other occupations; only humans rival mouselings for
ambition.
Ability Score Increase. Your Charisma score
increases by 1.
Brave. You have advantage on saving throws
you make against being frightened.
Nimble Escape. When a creature you can see
makes an opportunity attack against you, you can use
your reaction to impose disadvantage on the attack
roll. You can’t use this trait when wearing medium or
heavy armor.
Ratling
Ratlings often stand a full foot taller than their
mouseling relatives, also having longer tails and
more pointed ears. They are tougher, more resistant
to poison, and far more stubborn than mouselings,
but are also unquestionably resourceful. When
needed, a ratling can escape just about any enclosure
that isn’t constructed entirely from metal and stone, a
fact which many jailers hold in contempt.
Ability Score Increase. Your Strength score
increases by 1.
Gnaw. You can use your action to chew
through and break a small nonmagical object
that isn’t being worn or carried, like a rope, a
wooden rod or handle, or a length of fabric.
If you chew on a wooden wall or floor for 1
minute, you can gnaw a hole large enough for a
Tiny creature. You can’t chew through materials
that are harder than your teeth, such as metal,
stone, or crystal.
Rat Resilience. You have advantage on saving
throws against poison, and you have resistance
against poison damage.