Your Wisdom increases by 2 and your Charisma increases by 1.

As a Fey Creature you have a relatively long lifespan for a dog, you age at the same rate as humans.

Often the sworn companions of fairy's, who travel and battle with them in the service of a mount. Their loyalty to chaotic creatures means they are typically Chaotic Good. Though Fey Corgi's who have been domesticated in other civilizations have been known to hold different alignments.

Fey Corgi's are often larger than their non-magical counter part, when standing on their hind legs they vary between 2 and 3 feet tall. Your size is Small.

Your base walking speed is 25 feet.

Whilst you are not holding anything in either hand, you can elect to walk on all fours. Whilst walking on all fours you gain an additional 10 feet to your base walking speed.

Your fanged maw is a natural weapon, which you can use to make unarmed strikes. If you hit with it, you deal piercing damage equal to 1d4 + your Strength Modifier, instead of the bludgeoning damage normal for an unarmed strike.

You have advantage on saving throws against being charmed, and magic can't put you to sleep.

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

Whilst on all fours, when you use the dash action to move in a straight line towards a creature you may make a bite attack against that creature as a bonus action. If the attack was successful and the target is no more than one size category larger than you, then the target must make a strength saving throw, on a failed save the target falls prone. The DC = 8 + Your Proficiency + Your strength modifier.

Whilst walking on all fours, you have advantage on Charisma (Deception) checks made to convince other creatures that you are an ordinary dog providing that the creatures you are trying to convince haven't seen you do anything an ordinary dog couldn't do.

You can speak, read, and write Common, and Sylvan.