Guardian Naga

Guardian Naga CR: 10

Large monstrosity, lawful good

Armor Class: 18 (natural armour)

Hit Points: 127 15d10+45

Speed: 40 ft

STR

19 +4

DEX

18 +4

CON

16 +3

INT

16 +3

WIS

19 +4

CHA

18 +4

Saving Throws: Dex +8, Con +7, Int +7, Wis +8, Cha +8

Damage Immunities: Poison

Condition Immunities: Charmed, Poisoned

Senses: Darkvision 60, passive Perception 14

Languages: Celestial, Common (Hindi)

Challenge Rating: 10

The naga is an 11th level spellcaster. It's spellcasting ability id Wisdom (spell save DC 16, +8 to hit with spell attacks), and it needs only verbal components to cast it's spells. It has the following cleric spells prepared:
1st level (4 slots): Command, Cure Wound, Shield of Faith

At will: Cantrips: Mending, Sacred Flame, Thaumaturgy

1/day: 6th level: True Seeing

2/day: 5th level: Flame Strike, Geas

3/day: 2nd level: Calm Emotions, Hold Person 3rd level: Bestow Calm, Clairvoyance 4th level: Banishment, Freedom of Movement

Rejuvenation. If it dies, the naga returns to life in 1d6 days and regains all of it's hit points. Only a Wish spell can prevent this trait from functioning.

Actions

Bite. Melee Weapon Attack +8 to hit, reach 10 ft, one creature. Hit 8 1d8+4 piercing damage, and the target must make a DC 15 Constitution saving throw, taking 45 10d8 poison damage on a failed save, or half as much damage on a successful one.
Spit Poison. Ranged Weapon Attack +8 to hit, range 15/30 ft, one creature. Hit - the target must make a DC 15 Constitution saving throw, taking 45 10d8 poison damage on a failed save, or half as much damage on a successful one.

Green & cream in colour, guardian nagas are powerful, wise, and benevolent to those they meet or rule. If angered though, they can turn vicious. Any slight might do this too.

Suggested Environments

India, Asia