+2 to Wis, +1 to Dex

You have 30 feet of walking speed, you also have 20 feet of burrowing speed. You can burrow through loose earth and dirt, but not solid rock. When burrowing through hard-packed earth, gravel, or similar dense but not solid material, your burrowing speed is halved. You can hold your breath for up to 1 hour while burrowing and gain advantage on stealth along with half-cover. you must use a bonus action to burrow.

You have a number of Earthen Charges equal to your proficiency bonus. You regain all expended charges after a long/short rest. These charges fuel your more specialized burrowing, which include;

• Earthen Ambush: As a reaction you can expend one Earthen Charge to quickly emerge from the ground within 5 feet of an enemy. If you do so, you can make one unarmed attack against that creature with advantage
• Earthen Retreat: As a reaction when you take damage from a creature within 5 feet of you, you can expend one Earthen Charge to immediately burrow into the ground, you gain total cover

you have 60 feet of darkvision and 15 feet of tremorsense only when you're burrowing

when making an unarmed strike you may instead use your sharp mandibles dealing 1d4 (with finesse) piercing damage. (the damage type cannot be changed as its already an alteration of the attack)

You can speak Common and Undercommon