Sources
CR
Type
Size
Alignment
Movement

Guardian Naga

Large Monstrosity, Lawful Good

Armor Class 18 (natural armor)
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 ft., passive Perception 14
Languages Celestial, Common
Challenge 10 (5,900 XP)

Traits

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

Spellcasting

Spellcasting. The naga is an 11th-level spellcaster. Its spellcasting ability is Wisdom (spell save DC 16, +8 to hit with spell attacks), and it needs only verbal components to cast its spells. It has the following cleric spells prepared:

Cantrips (at will): mending, sacred flame, thaumaturgy

1st level (4 slots): command, cure wounds, shield of faith

2nd level (3 slots): calm emotions, hold person

3rd level (3 slots): bestow curse, clairvoyance

4th level (3 slots): banishment, freedom of movement

5th level (2 slots): flame strike, geas

6th level (1 slot): true seeing

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.

Lore

Nagas are intelligent serpents that inhabit the ruins of the past, amassing arcane treasures and knowledge.