Sources
CR
Type
Size
Alignment
Movement

Raklupis Spyder-Fiend

Large Fiend (demon), Chaotic Evil

Armor Class 19 (natural armor)
Hit Points 210 (28d10 + 56)
Speed 40 ft., climb 40 ft.
STR
17
+3
DEX
20
+5
CON
14
+2
INT
18
+4
WIS
16
+3
CHA
23
+6
Saving Throws DEX +11, CON +8, WIS +9
Skills Perception +9, Stealth +11
Damage Immunities cold, fire, lightning, poison
Condition Immunities Poisoned
Senses truesight 120 ft., passive Perception 19
Languages Abyssal, Common, telepathy 120 ft.
Challenge 19 (22,000 XP)

Traits

Magic Resistance. The raklupis has advantage on saving throws against spells and other magical effects.

Spider Climb. The raklupis can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.

Web Sense. When in contact with a web, the raklupis knows the exact location of any other creature in contact with the same web.

Web Walker. The raklupis ignores movement restrictions caused by webbing.

Spellcasting

Spellcasting. The raklupis casts one of the following spells, requiring no material components and using Charisma as the spellcasting ability (spell save DC 20).

At will: Disguise Self, Invisibility (self only), Mage Hand, Minor Illusion

2/day each: Darkness, Dominate Monster, Mass Suggestion, Telekinesis, Teleport

Actions

Multiattack. The raklupis makes a Bite attack and two Serrated Sword attacks. It can use Venom Globe in place of one of these attacks.

Bite. Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit:16 (2d10 + 5) piercing damage plus 18 (4d8) poison damage. If the target is a creature, it must succeed on a DC 20 Constitution saving throw or have the poisoned condition for 1 minute. While poisoned in this way, a creature has the incapacitated condition and can't regain hit points. A poisoned creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Serrated Sword. Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit:19 (4d6 + 5) slashing damage plus 18 (4d8) poison damage.

Venom Globe. Ranged Weapon Attack: +11 to hit, range 60/180 ft., one target. Hit:45 (10d8) poison damage.

Bonus Actions

Demand Loyalty. The raklupis magically ends the charmed and frightened conditions on itself and on any number of allies within 60 feet of itself.

Lore

Raklupis spyder-fiends have hard, smooth shells and gleaming spines. With luxuriantly furry wolf heads, powerful arms, and alluring voices, raklupises are the only spyder-fiends that might be called majestic. They create delicate web globes, which they fill with their venom and hurl at foes. Raklupises are keen strategists, and most of them command legions of lesser spyder-fiends.