Tunneler. You can burrow through solid rock at half of your burrow speed, and you leave a tunnel at your size on your wake.

Constrictor. Make a melee attack with weapon as part of this action, if you hit you start squishing your target dealing 1d6 + Strenght modifier of bludgeoning damage, and the target becomes grappled(DC = 8 + Strenght modifier + Proficiency Bonus and can grappled creatures one size larger than you). When grappled, the target takes 1d4 + Strenght modifier each start of it's turn. Until this grapple ends, the target is restrained, have disadvantage in Strength checks and you can't constrict another target.

Breath attack. You can use your action to exhale destructive energy. Your draconic Ancestry determines the size, shape, and damage type of the exhalation. When you use your breath attack, each creature in the area of the exhalation must make a saving throw, the type of which is determined by your draconic ancestry. The DC for this saving throw equals 8 + your Constitution modifier + your proficiency bonus. A creature takes 1d10 damage on a failed save, and half as much damage on a successful one. The damage increases to 2d10 at 6th level, 3d10 at 11th level, and 4d10 at 16th level.

Bite. As an action, you may make a bite attack against an enemy within 5 feet of you. On hit, the target takes 1d8 piercing damage.

Snake Shape. You are unable to use normal armor or rings unless it has been specially tailored for you. Armor made specifically for you takes 2 times as long to make than regular armor, and costs 2 times the normal price.

Armless. You do not have arms or legs, only a long and coiling body. You can not use any equipment that would require hands or feet. You can wield one-handed weapons and items, but must do so using your mouth. You can wear rings, but only one and it must be on your tail.