# [Grandlejaw](Rules\Source\bestiary\npc/grandlejaw-pabtso.md)
*Source: Phandelver and Below: The Shattered Obelisk p. 121*
```statblock
"name": "Grandlejaw (PaBTSO)"
"size": "Huge"
"type": "monstrosity"
"alignment": "Unaligned"
"ac": !!int "15"
"ac_class": "natural armor"
"hp": !!int "172"
"hit_dice": "15d12 + 75"
"modifier": !!int "1"
"stats":
- !!int "20"
- !!int "12"
- !!int "20"
- !!int "2"
- !!int "10"
- !!int "7"
"speed": "30 ft., swim 30 ft."
"skillsaves":
- "name": "[Perception](/Rules/Source/skills.md#Perception)"
"desc": "+6"
"senses": "[darkvision](/Rules/Source/senses.md#Darkvision) 60 ft., passive Perception\
\ 16"
"languages": ""
"cr": "8"
"traits":
- "desc": "Grandlejaw can hold its breath for 1 hour."
"name": "Hold Breath"
- "desc": "Grandlejaw has five heads. While it has more than one head, Grandlejaw\
\ has advantage on saving throws against being [blinded](/Rules/Source/conditions.md#Blinded),\
\ [charmed](/Rules/Source/conditions.md#Charmed), [deafened](/Rules/Source/conditions.md#Deafened),\
\ [frightened](/Rules/Source/conditions.md#Frightened), [stunned](/Rules/Source/conditions.md#Stunned),\
\ and knocked [unconscious](/Rules/Source/conditions.md#Unconscious).\n\nWhenever\
\ Grandlejaw takes 25 or more damage in a single turn, one of its heads dies.\
\ If all its heads die, Grandlejaw dies.\n\nAt the end of its turn, it grows\
\ two heads for each of its heads that died since its last turn, unless it has\
\ taken fire damage since its last turn. Grandlejaw regains 10 hit points for\
\ each head regrown in this way."
"name": "Multiple Heads"
- "desc": "For each head Grandlejaw has beyond one, it gets an extra reaction that\
\ can be used only for opportunity attacks."
"name": "Reactive Heads"
- "desc": "While Grandlejaw sleeps, at least one of its heads is awake."
"name": "Wakeful"
"actions":
- "desc": "Grandlejaw makes as many bite attacks as it has heads."
"name": "Multiattack"
- "desc": "*Melee Weapon Attack:* +8 to hit, reach 10 ft., one target. *Hit:* 10\
\ (1d10 + 5) piercing damage."
"name": "Bite"
"source":
- "PaBTSO"
"image": "/Rules/Source/bestiary/npc/token/grandlejaw-pabtso.webp"
```
^statblock