You emit a caustic sludge in your mouth and on your claws. Whenever you make an unarmed strike or natural weapon attack, it deals an extra 1d6 poison damage on hit.

You can spit poison at a creature within 60 feet of you as a ranged natural attack. It deals 1d12 poison/acid damage on a hit (your choice when you make the attack).

You have two natural weapons you can use, a Bite and your Claws. A Bite deals 1d6 piercing damage on hit and your Claws deal 1d6 slashing damage on hit.

Since you evolved to be a primitive beast, your Intelligence score can never go above 6.

Your incredibly thick hide gives you a base AC of 11 + your Strength, Dexterity, and Constitution Modifiers. You can use this natural armor if it would give you a higher AC than armor you are wearing or another method of calculating your AC. You can use this natural armor with a Shield and still gain its benefits.

Your muscular reptilian frame gives you a +2 bonus to your Strength and Constitution scores and you can calculate your Carrying Capacity as if you were a Gargantuan creature.

Whenever you are in a space that is less than 20 feet x 20 feet x 20 feet in any dimension, you have the Frightened condition. You will have this condition even when it is removed or if you have Immunity until you exit the cramped space.