Monster
Thessalhydra
Outside your table’s allowed sources
Official reference · HftT · 2014
- Creature type
- Monstrosity
- Size
- Huge
- Armor class
- 14 (natural armor)
- Hit points
- 69 (6d12 + 30)
- Speed
- Walk 30 ft., Swim 30 ft.
- Challenge rating
- 4
- Alignment
- Unaligned
- Strength
- 19
- Dexterity
- 12
- Constitution
- 20
- Intelligence
- 5
- Wisdom
- 10
- Charisma
- 7
- Passive Perception
- 14
- Skills
- perception: +4
- Senses
- darkvision 60 ft.
- Immunities
- acid
- Condition Immunities
- blinded, charmed, deafened, frightened, stunned
Actions
Multiattack
The thessalhydra makes one maw attack and one Flurry of Bites.
Flurry of Bites
Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 7 (1d6 + 4) piercing damage plus 10 (4d4) poison damage.
Maw
Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 9 (1d10 + 4) piercing damage plus 5 (1d10) acid damage.
Tail Pincer
Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 10 (1d12 + 4) slashing damage, and the target is grappled. As an action, the target can escape the grapple by succeeding on a DC 14 Strength (Athletics) or Dexterity (Acrobatics) check (its choice). Until this grapple ends, the thessalhydra can't use its tail pincer.
Acid Saliva (Recharge 5–6)
The thessalhydra spits a glob of acid at a point it can see within 30 feet of it. Each creature within 10 feet of that point must make a DC 15 Dexterity saving throw, taking 18 (4d8) acid damage on a failed save, or half as much damage on a successful one.
Legendary action uses: 2. The creature can use one option at the end of another creature’s turn and regains spent uses at the start of its turn.
Legendary actions
Detect
The thessalhydra makes a Wisdom (Perception) check with advantage.
Tail Swipe
The thessalhydra makes a tail pincer attack.