Earth Elemental

Large elemental, neutral

Armor Class: 17 (natural armor)
Hit Points: 126 (12d10 + 60)
Speed: 30 ft., burrow 30 ft.

STR: 20 (+5)
DEX: 8 (−1)
CON: 20 (+5)
INT: 5 (−3)
WIS: 10 (+0)
CHA: 5 (−3)

Damage Vulnerabilities: thunder
Damage Resistances: bludgeoning, piercing, and slashing from nonmagical attacks
Damage Immunities: poison
Condition Immunities: exhaustion, paralyzed, petrified, poisoned, unconscious
Senses: darkvision 60 ft., tremorsense 60 ft., passive Perception 10
Languages: Terran
Challenge: 5 (1,800 XP)

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

Siege Monster. The elemental deals double damage to objects and structures.

Actions

Multiattack. The elemental makes two slam attacks.

Slam. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 14 (2d8 + 5) bludgeoning damage.

Running this fight? Add the earth elemental to the initiative tracker: type its name and the AC, hit points and initiative bonus fill in, and the book button shows this stat block mid-fight.