Bone Naga

Large undead, lawful evil
Armor Class 15 (natural armor)
Hit Points 58 (9d10 + 9)
Speed 30 ft.
STR
15 (+2)
DEX
16 (+3)
CON
12 (+1)
INT
15 (+2)
WIS
15 (+2)
CHA
16 (+3)
Damage Immunities poison
Condition Immunities charmed, exhaustion, paralyzed, poisoned
Senses darkvision 60 ft., passive Perception 12
Languages Common plus one other language
Challenge 4 (1100 XP)

Spellcasting. The naga is a 5th-level spellcaster (spell save DC 12, +4 to hit with spell attacks) that needs only verbal components to cast its spells.

If the naga was a guardian naga in life, its spellcasting ability is Wisdom, and it has the following cleric spells prepared:
Cantrips (at will) : mending, sacred flame, thaumaturgy
1st level (4 slots): command, shield of faith
2nd level (3 slots): calm emotions, hold person
3rd level (2 slots): bestow curse
If the naga was a spirit naga in life, its spellcasting ability is Intelligence, and it has the following wizard spells prepared:
Cantrips (at will) : mage hand, minor illusion, ray of frost
1st level (4 slots): charm person, sleep
2nd level (3 slots): detect thoughts, hold person
3rd level (2 slots): lightning bolt
Actions

Bite. Melee Weapon Attack: +5 to hit, reach 10 ft., one creature. Hit: 10 (2d6 + 3) piercing damage plus 10 (3d6) poison damage.

Monster Manual
  1. DnD 5e Monsters › Bone Naga
Bone Naga