The thessalydra is a strange and terrible creature with eight heads surrounding a large, circular mouth rimmed with jagged teeth. Its maws drips with aci, and its tsil ends with a pair of sharp pincers. The thessalhydra is gluttonous and damaging to any environment.
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 piercing damage plus 10 posion damage.
Maw. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 9 piercing damage plus 5 acid damage.
Tail Pincer. Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 10 slashing and the target is grapped. As an action, the target can escape the grapple by succeedingon a DC 14 “Atheletics” or “Acrobatics” check (its choice). Until this grapple ends, the Thessalhydra can’t use its tail pincer.
Acid Saliva (Recharge 5-6). The thessalhydra splits 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.