Predator of the Upside Down, the Demogorgon hunts the dimension looking for unfortunate creatures that find their way there. The size and shape of an adult humanoid, the demogorgon's mouth encompasses its face and unfolds like a blossoming flower.
Keen Smell. Has advantage on Wisdom (Perception) checks that rely on smell.
Blood Frenzy. Has advantage on melee attack rolls against any creature that doesn't have all it's hit points.
Regeneration. Regains 10 hit points at the start of its turn. If the Demogorgon takes acid or fire damage, this trait doesn't function at the start of the next turn. Dies only if it starts its turn with 0 hit points and cant regenerate.
Multiattack. Makes three attacks, one with its bite, two with its claws.
Bite. Melee weapon attack. +5 to hit, 5ft reach, single target. Hit 7 (1d8+3) piercing
Claw. Melee weapon attack. +5 to hit, 5ft reach, single target. Hit 12 (2d8+3)
The Thesselhydra is a strange and terrible creature with eight heads surrounding a large, circular mouth rimmed with jagged teeth. Its maw drips with acid and its tail 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, 10ft reach, single target. Hit 7 (1d6+4) piercing damage plus (4d4) poison damage.
Maw. Melee weapon attack. +7 to hit, 5ft reach, signle target. Hit 9 (1d10+4) piercing damage plus 5 (1d10) adic damage
Tail pincer. Melee weapon attack. +7 to hit, 5ft reach, single target. Hit 10(1d12+4) slashing damage and target is grappled. As an action, the target can escape the grapple by succeeding on a DC 14 Strength (Athletics) or Dexterity (Acrobatics). Until the 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 30ft of it. Everything within 10ft of that area must make a DC 15 Dexterity saving throw, taking 18 (4d8) acid damage on a failed save, or half as much on a successful one.
Only one legendary action can be used at a time and only at the end of another creatures 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.