Cavern Hunger CR: 7
Large elemental, chaotic evil
Armor Class: 18 (Natural Amor)
Hit Points: 84 (12d8 + 36)
Speed:
15 ft
, fly: 60 ft
STR
18 +4
DEX
11 +0
CON
16 +3
INT
8 -1
WIS
14 +2
CHA
7 -2
Saving Throws: CON +6, WIS +5
Skills: Perception +5
Damage Immunities: Poison; Bludgeoning, Piercing, and Slashing from Nonmagical Attacks
Condition Immunities: Grappled, Petrified, Poisoned, Restrained
Senses: Darkvision 60 ft., Tremorsense 60 ft, Passive Perception 15
Languages: Terran
Challenge Rating: 7
False Appearance. While the cavern hunger remains motionless, it is indistinguishable from the stone of a cave.
Actions
Multiattack. The cavern hunger makes 3 bite attacks. Bite. Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 10 (1d12 + 4) piercing damage plus the target is grappled. The cavern hunger can automatically deal 1d12+4 piercing damage to any creature it has grappled in replacement of a bite attack. Descending Stone. When the cavern hunger moves 30 feet along the top part of a cavern it can dislodge stones. It must make a Strength check DC 15. If successful, any creature within a 30 ft line that is 10 ft wide below this path must make a Dexterity saving throw DC 15. Any creature that fails takes 5d6 bludgeoning damage.
These earth elementals are bizarre creatures of stone. Their bodies are slim and circular and they often seek prey by laying in wait. They are able to attach to the opening of a cavern. Once their prey walks through their teeth protract and they bite onto their enemy.