1. Races

Gray Slaad

Medium Aberration, Chaotic Neutral
AC 18
Initiative +7 (17)
HP 150 (20d8 + 60)
Speed 40 ft.
mod
save
mod
save
mod
save
Str
19
+4
+4
Dex
17
+3
+3
Con
16
+3
+3
Int
13
+1
+1
Wis
8
-1
-1
Cha
18
+4
+4
Skills Arcana +5Perception +7
Resistances Acid, Cold, Fire, Lightning, Thunder
Senses Blindsight 60 ft., Darkvision 60 ft., Passive Perception 17
Languages Common, Slaad; telepathy 60 ft.
CR 9 (XP 5,000; PB +4) 

Traits

Magic Resistance. The slaad has Advantage on saving throws against spells and other magical effects.

Regeneration. The slaad regains 10 Hit Points at the start of each of its turns if it has at least 1 Hit Point.

Actions

Multiattack. The slaad makes two Chaos Claw attacks.

Chaos Claw. Melee Attack Roll: +8, reach 10 ft. Hit: 9 (1d10 + 4) Slashing damage plus 11 (2d10) Necrotic damage. Until the start of the slaad's next turn, the target has a condition determined by rolling 1d4: on a 1, Charmed; on a 2, Frightened; on a 3, Poisoned; or on a 4, Incapacitated.

Spellcasting. The slaad casts one of the following spells, requiring no Material components and using Charisma as the spellcasting ability (spell save DC 16):

Bonus Actions

Shape-Shift. The slaad shape-shifts into a Small or Medium Humanoid, or it returns to its true form. Other than its size, its game statistics are the same in each form. Any equipment it is wearing or carrying isn't transformed.