You can use your 4 arms to wield weapons and manipulate objects. Using a weapon without the light property takes you two arms to use, and a weapon with the heavy or two-handed property takes all four of your arms.

Avians have claws at the end of all of their appendeges. You can use your claws and craa as natural weapons.

Avians can fold thier neck, wings and tail to fit in a smaller space. You can gain full cover from an object that would normally give you half or three-quarters cover.

Given their short legs, Avians are quite clumsy on ground. You have disadvantage on Dexterity checks while you are on the ground.

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

Your body is made out of ice. You are immune to cold damage, but vulnerable to bludgeoning damage.

Any creature you touch with an uncovered limb or you hit with an attack has their movement reduced by 5 ft. for 1 turn. This can also frezee 1 gallon of water.

You can stand completly still, anyone who haven't seen you move mistakes you for a statue of ice. If they decide to investigate you, you must triumph in an Investigation vs. Stelth contest to fool them.

Once per short rest, as a bonus action, you can cause the the temperature to drop dramatically around you for your proficiency minutes. All water freezes in a 30 ft. radius around you. Any creature that enters your 30 ft. area, starts its turn in it or hits you with a melee attack takes 1d6 (1d8 lvl 5, 1d10 lvl 10) cold damage.

Increase your Dexterity score by 2 and your Intelligence by 1.

Avians have an array of light and electricity sensitive, mini-eyes. You can see normally in any ammount of light (but not in magical darkness), but you are completly colorblind. You also have advantage on perception checks that relies on sight.

Your creature type is Elemental.

No armor has been created yet that would be considered "heavy" and an Avian could wear. You cannot wear heavy armor.