Sources
CR
Type
Size
Alignment
Movement

Huge Giant Crab

Huge Beast, Unaligned

Armor Class 15 (natural armor)
Hit Points 161 (14d12 + 70)
Speed 30 ft., swim 30 ft.
STR
20
+5
DEX
15
+2
CON
20
+5
INT
1
-5
WIS
9
-1
CHA
3
-4
Skills Stealth +5
Condition Immunities Charmed, Frightened, Paralyzed
Senses blindsight 30 ft., passive Perception 9
Languages
Challenge 8 (3,900 XP)

Traits

Banded Claw. On one of its claws, the crab wears a rune-covered copper band that makes it immune to being charmed, frightened, and paralyzed. The copper band is worthless as a treasure, as the magic is keyed to this crab.

Amphibious. The crab can breathe air and water.

Actions

Claw. Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit:27 (4d10 + 5) bludgeoning damage, and the target is grappled, escape DC 14. The crab has two claws, each of which can grapple only one target.