Armor Class
14
Thessalhydra
Huge Monstrosity · Unaligned
Hit Points
69 (6d12 + 30)
Speed
Walk 30 ft., Swim 30 ft.
CR
4
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. 7 () Piercing damage plus 10 () Poison damage.
Piercing
PoisonMaw
Melee Weapon Attack +7 to hit, reach 5 ft., one target. 9 () Piercing damage plus 5 () Acid damage.
AcidTail Pincer
Melee Weapon Attack +7 to hit, reach 10 ft., one target. 10 () Slashing damage, and the target is . As an action, the target can escape the grapple by succeeding on a DC 14 Strength () or Dexterity () check (its choice). Until this grapple ends, the thessalhydra can't use its tail pincer.
SlashingAcid Saliva Recharge 5
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 () Acid damage on a failed save, or half as much damage on a successful one.
Legendary Actions
Detect
The thessalhydra makes a Wisdom () check with advantage.
Tail Swipe
The thessalhydra makes a tail pincer attack.