uncommon le large aberration 

Perception +15; darkvision, mind reading 30 feet

Languages Aklo, Common

Skills Acrobatics +17, Arcana +16, Athletics +13, Deception +16, Intimidation +16, Stealth +19

Str +2 Dex +6 Con +4 Int +3 Wis +2 Cha +3

AC  27; Fort +15, Ref +17, Will +15

HP 115

Guarded Thoughts (abjuration, occult) Dark nagas are immune to any form of mind reading.

Speed 30 feet

Melee [>] fangs +19 (agile, finesse), Damage 2d8+5 piercing plus dark naga venom

Arcane Spontaneous Spells DC 26, attack +18; 4th (3 slots) blink, wall of fire; 3rd (4 slots) dispel magic, haste, lightning bolt; 2nd (4 slots) illusory creature, invisibility, magic missile; 1st (4 slots) feather fall, illusory object, longstrider; Cantrips (4th) daze, detect magic, mage hand, read aura, shield

Occult Innate Spells DC 25; Constant (3rd) mind reading

Dark Naga Venom (incapacitation, poison) Saving Throw DC 25 Fortitude; Maximum Duration 5 minutes; Stage 1 slowed 1 (1 round); Stage 2 slowed 2 (1 round); Stage 3 unconscious with no Perception check to wake up (1d4+1 minutes)

Bestiary, page 242. Expanded in LOIL.