Your Strength increases by 4 to a maximum of 28, your Constitution increases by 4 to a maximum of 22 and your Wisdom score increases by 1. The minimum intelligence score you can have is 10.

Purple worms reach maturity at 70 years and some have been documented to live up to 500 years.

Purple worms were regarded as neutral in alignment since their aggressive nature was the result of instinct rather than evil maliciousness.

Your size is gargantuan, you measure about 80 ft (20m) long and 10 ft wide. Your weight is between 40,000-60,000 pounds.

You having a walking speed of 50 ft and a burrow speed of 30 ft.

Through whatever magical means that gave you sentience, you were given the ability to telepathically communicate with any creature within 60 ft of you. You have tremorsense out to 60 ft and you have blindsight out to 30 ft.

Your natural armor class is 18 (your DEX modifier does not apply), but if you wish to wear armor for your massive figure you must have it specifically tailored to fit your dimensions. Your large and hulking form grants you 5 hit points for every class level you have.

You can burrow through solid rock at half your burrow speed and you leave a 10-foot-diameter tunnel in your wake.

As an action, you can take two attacks against a creature within range: one with your bite and another with your tail stinger.

 Your Bite is considered a Melee Weapon Attack and has a reach of 10 ft dealing (3d8 + STR) piercing damage. If the target is a Large or smaller creature, it must succeed on a Dexterity saving throw equal to 8 + your Strength modifier + your proficiency bonus modifier or be swallowed by you. A swallowed creature is blinded and restrained, it has total cover against attacks and other effects outside of you, and it takes (6d6) acid damage at the start of each of your turns.

If you take 30 damage or more on a single turn from a creature that is inside of you, you must succeed on a DC 21 Constitution saving throw at the end of that turn or regurgitate all swallowed creatures, which fall prone in a space within 10 feet of you. If you die, a swallowed creature is no longer restrained by you and can escape from your corpse by using 20 feet of movement, exiting prone.

Your Tail Stinger is considered a  Melee Weapon Attack and has a of reach 10 ft dealing (3d6 + STR) piercing damage, and the target must make a Constitution saving throw equal to 8 + your Constitution modifier + your proficiency bonus modifier, taking (12d6) poison damage on a failed save, or half as much damage on a successful one.

Not having limbs or being capable of speech makes the casting of spells extremely difficult, but luckily (or unluckily) for you the powerful magical energy that radiates from you is infused to your very essence, Whenever you roll a natural 1 on an attack roll you roll on the wild magic table taking whatever effect you role on the table. The tremendous amount of magical energy you exude when in the presence of other creatures is palpable and leaves you vulnerable to detection from spells that and abilities that can sense magic such as the detect magic spell.