Gift of the Earth Elemental

You’ve manifested some of the power of earth elementals, granting you the following benefits:

• You gain tremorsense out to a range of 60 feet.
• As a bonus action, you can give yourself a burrowing speed of 30 feet until the start of your next turn. While you have this burrowing speed you can burrow through nonmagical, unworked earth and stone. While doing so, you don't disturb the material you move through. If you start your turn while burrowed underground and don't use this feature, you are shunted to the nearest unoccupied space that you can occupy and take force damage equal to twice the number of feet you are moved. You can use this feature a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.
• When you are hit by an attack that deals bludgeoning, piercing, or slashing damage, you can use your reaction to halve the attack’s damage against you. You can use this feature a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.