Earth Orb (5e Creature)
From D&D Wiki
Small elemental, neutral
Damage Vulnerabilities thunder
Slam. Melee Spell Attack: +3 to hit, reach 5 ft., one target. Hit: 10 (3d6) bludgeoning damage.
A sphere of dust, dirt, and stone fragments, an earth orb is a resolute and intelligent creature of elemental earth. They are somewhat ponderous, every movement a keenly thought-out affair, though they can easily keep pace with an adult human when they have to move quickly.
Elemental Nature. An earth orb doesn't require air, food, drink, or sleep.