Death Slaad

Medium aberration (Shapechanger), chaotic evil
Armor Class 18 (natural armor)
Hit Points 170 (20d8 + 80)
Speed 30 ft.
STR
20 (+5)
DEX
15 (+2)
CON
19 (+4)
INT
15 (+2)
WIS
10 (+0)
CHA
16 (+3)
Skills Arcana +6, Perception +8
Damage Resistances acid, cold, fire, lightning, thunder
Senses blindsight 60 ft., darkvision 60 ft., passive Perception 18
Languages Slaad, telepathy 60 ft.
Challenge 10 (5900 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
Death Slaad