You have advantage on perception checks. 

You count as one size larger when determining your carrying capacity and the weight you can push, drag, or lift. Additionally, you can wield weapons one size category larger without suffering a penalty. 

You treat glaives as if they have the thrown property with a range (30/120).

Your Constitution score increases by 2.

Fennrysians mature at the same rate as humans, but they’re considered young until they reach the age of 100. They rarely die of old age, but those that do live to be nearly 1000 years old.

Most fennrysians tend towards true neutral. Growing up in harsh waste-land where everyone looked out for themselves in anyway that they could.

Fennrysians stand between 6 and 8 feet tall and average around 250 pounds, but they can weight as much as 500 pounds. Your size is Medium.

Your base walking speed is 35 feet. Your speed is not reduced by wearing heavy armor.

Accustomed to life underground, you have superior vision in dark and dim conditions. You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can’t discern color in darkness, only shades of gray.

You have proficiency with the battleaxe, glaive, longsword, short sword, and heavy armor.

You can speak, read, and write Common and Fennrysian. Fennrysian is full of hard consonants and guttural sounds, and those characteristics spill over into whatever other language a fennrysian might speak.