Earth Mephit

The mephit can burrow through nonmagical, unworked earth and stone. While doing so, the mephit doesn't disturb the material it moves through.

When the mephit dies, it explodes in a burst of earth. Each creature within 5 feet of it must then succeed on a DC 11 Dexterity saving throw or take 5 (2d4) bludgeoning damage and be knocked prone. If the mephit is doused in water (at least one gallon), this trait ceases to function for the next minute.

Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 6 (1d6 + 1) slashing damage. This attack deals an additional 3 (1d6) damage to a prone creature.

Each creature in a 15 foot cone must succeed on a DC 11 Dexterity saving throw or take 6 (1d12) bludgeoning damage and fall prone, or half as much damage on a success. The affected area becomes difficult terrain.

As a reaction to being targeted with a weapon attack, the mephit may gain resistance to that attack's damage. If the mephit is doused in water (at least one gallon), this trait ceases to function for the next minute.