The Sovereign of Serpents gargantuan monstrosity (titan), chaotic evil Armor Class 25 (natural armour)

25 (natural armour) Hit Points 649 (30d20 + 300)

649 (30d20 + 300) Speed 80ft., climb 60ft. STR DEX CON INT WIS CHA 27 (+8) 17 (+ 3) 30 (+10) 12 (+1) 23 (+6) 30 (+10) Saving Throws Str +15, Con +17, Wis +13, Cha +17

Str +15, Con +17, Wis +13, Cha +17 Damage Resistances Cold, fire, lightning

Cold, fire, lightning Damage Immunities Acid, Poison, bludgeoning, piercing and slashing damage from non magical weapons

Acid, Poison, bludgeoning, piercing and slashing damage from non magical weapons Condition Immunities prone, charmed, deafened, frightened, blinded, restrained, grappled

prone, charmed, deafened, frightened, blinded, restrained, grappled Senses passive Perception 28

passive Perception 28 Languages Telepathy 120 ft.

Telepathy 120 ft. Challenge 30 (155,000 XP) False Appearance. While the Sovereign remains motionless, they are indistinguishable from a pile of stone or rock formation.

Innate Spellcasting The sovereign's innate spellcasting ability is charisma (spell save DC 22, +14 to hit with spell attacks). They can cast the following spells without material components.

At will: Chromatic Orb (3rd level version, dealing poison damage), Melf's Acid Arrow (4th level version),

3/day each: Vitriolic Sphere (6th level version), Steel Wind Strike (dealing acid instead of force damage), Melf's Acid Arrow (6th level version),

1/day each: Storm of vengeance (dealing acid damage in place of all other non-physical damage types) Meteor Swarm (dealing piercing instead of bludgeoning damage, and poison instead of fire damage)

Armoured Scales Whenever the Sovereign takes 100 or more points of damage from bludgeoning, piercing, and slashing damage in a single round, their AC decreases by 1.

Healing Factor At the start of each of their turns, the Sovereign regains 50 hit points, or 70 if they are in their lair.

Legendary Resistances 5/day Whenever the Sovereign fails a saving throw, they can choose to succeed instead.

Acidic Form When the Sovereign is below half their total hit points, any creature that hits them with a melee weapon attack while with 15 feet of the Sovereign suffers 9 (2d8) acid damage.

Magic Resistance The Sovereign is immune to spell’s and their effects of 6th level or lower unless they choose to be affected. Additionally, the Sovereign has advantage on saving throws against spells and other magical effects.

Actions Multiattack The Sovereign makes three bite attacks and one tail attack. the tail attack and the bite attacks cannot target the same creature. If any of the bite attacks hit, The Sovereign can replace one bite attack with swallow.

Bite Melee weapon attack: +15 to hit, reach 20 ft., one target. Hit: 31 (4d10 + 8) piercing damage plus 14 (3d8) poison damage.

Swallow One target hit by a bite attack must succeed on a DC 23 Athletics or Acrobatics check, or be swallowed. While swallowed in this way, the target is restrained, and they suffer 25 (6d8) acid damage and 34 (6d10) bludgeoning damage at the start of each of their turns. The Sovereign regains hit points equal to half the acid damage taken in this way. If The Sovereign suffers 30 or more points of damage in a single round from a creature that is swallowed, they must succeed on a DC 25 Constitution saving throw, or regurgitate a swallowed creature in a space adjacent to The Sovereign. Up to three creatures can be swallowed in this way at once, and every swallowed creature reduces Serpenterra’s speed by 10 feet, and its number of bite attacks with multiattack by one.

Tail Melee Weapon Attack: +15 to hit, reach 40 ft., one target. Hit: 51 (8d10 + 8) bludgeoning damage.

Frightful Presence Each creature of The Sovereign’s choice that is within 150 feet of them and that they are aware of must succeed on a DC 25 Wisdom saving throw or become frightened for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature’s saving throw is successful or the effect ends for it, the creature is immune to The Sovereign’s Frightful Presence for the next 24 hours.

Breath Weapons

Acid Breath (Recharge 5-6) All creatures in a 90 foot cone must succeed on a DC 25 Dexterity saving throw or suffer 734 (16d8) acid damage, halved on a success.