Gray Slaad

Medium aberration (shapechanger), chaotic neutral
Armor Class 18 (natural armor)
Hit Points 127 (17d8 +51)
Speed 30 ft.
STR
17 (+3)
DEX
17 (+3)
CON
16 (+3)
INT
13 (+1)
WIS
8 (-1)
CHA
14 (+2)
Skills Arcana +5, Perception +7
Damage Resistances acid, cold, fire, lightning, thunder
Senses blindsight 60 ft., darkvision 60 ft., passive Perception 17
Languages Slaad, telepathy 60 ft.
Challenge 9 (5000 XP)
Shapechanger.
Innate Spellcasting.
Magic Resistance.
Magic Weapons.
Regeneration.
ACTIONS
Multiattack.
Bite (Slaad Form Only).
Claws (Slaad Form Only).
Greatsword.

This full creature's stat block is not available (not OGL).

Monster Manual
Gray Slaad