Thessalhydra
Size
Huge
Monster Race
Monstrosity
Alignment
Unaligned
Armor Class
14 (natural armor)
Hit Points
69 (6d12 + 30)
Speed
6m, swim 6m
Attributes
STR
19 (+4)
DEX
12 (+1)
CON
20 (+5)
INT
5 (-3)
WIS
10 (+0)
CHA
7 (-2)
Features
Skills
Perception +4
Damage Immunities
Acid
Condition Immunities
Blinded, charmed, deafened, frightened, stunned
Senses
Darkvision 12m, passive perception 14
Challenge
4 (1,100 XP)
Actions
Multiattack
The thessalhydra makes one maw attack and one flurry of bites.
Flurry of Bites
Melee Weapon Attack: +7 to hit, reach 2m, one target. Hit: 7 (1d6 + 4) piercing damage plus 10 (4d4) poison damage.
Maw
Melee Weapon Attack: +7 to hit, reach 1m, one target. Hit: 9 (1d10 +4) piercing damage plus 5 (1d10) acid damage.
Tail Pincer
Melee Weapon Attack: +7 to hit, reach 2m, 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 6m of it. Each creature within 2m 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 Actions
Description
The thessalhydra can take 2 legendary action, chosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The thessalhydra regains spent legendary actions at the start of its turn.
Detect
The thessalhydra makes a Wisdom (Perception) check with advantage.
Tail Swipe
The thessalhydra makes a tail pincer attack.