Sources
CR
Type
Size
Alignment
Movement

Mordakhesh

Medium Fiend, Lawful Evil

Armor Class 18 (plate armor)
Hit Points 170 (20d8 + 80)
Speed 40 ft.
STR
20
+5
DEX
16
+3
CON
18
+4
INT
15
+2
WIS
17
+3
CHA
20
+5
Saving Throws STR +10, CON +9, WIS +8, CHA +10
Skills Athletics +10, Insight +8, Perception +8, Persuasion +10
Damage Vulnerabilities piercing, from magic weapons wielded by good creatures
Damage Resistances bludgeoning, piercing, slashing, from nonmagical attacks that aren't silvered
Senses darkvision 60 ft., passive Perception 18
Languages Common, Infernal
Challenge 15 (13,000 XP)

Traits

Limited Magic Immunity. Mordakhesh can't be affected or detected by spells of 6th level or lower unless he wishes to be. Mordakhesh has advantage on saving throws against all other spells and magical effects.

Spellcasting

Innate Spellcasting. Mordakhesh's spellcasting ability is Charisma (spell save DC 18, +10 to hit with spell attacks). Mordakhesh can innately cast the following spells, requiring no material components:

At will: chromatic orb (see "Actions" below), detect thoughts, disguise self

1/day each: banishing smite, destructive wave, fly, mass suggestion, staggering smite, suggestion, true seeing

Actions

Multiattack. Mordakhesh makes three greatsword attacks.

Greatsword. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit:12 (2d6 + 5) slashing damage plus 5 (1d10) force damage.

Chromatic Orb. Ranged Spell Attack: +10 to hit, range 120 ft., one creature. Hit:13 (3d8) damage of a type chosen by Mordakhesh: acid, cold, fire, lightning, poison, or thunder.

Legendary Actions

Attack. Mordakhesh makes one weapon attack or casts chromatic orb.

Chromatic Resistance. Modakhesh gains resistance to one damage type of his choice—acid, cold, fire, lightning, poison, or thunder—until the start of his next turn.

Warlord's Command (Costs 2 Actions). Mordakhesh targets up to two allies that he can see within 30 feet of him. If a target can see and hear him, the target can make one weapon attack as a reaction and gains advantage on the attack roll.

Lore

In the age when fiends and dragons waged war across Eberron, rakshasas served the fiendish lords as strategists and generals. A rakshasa named Mordakhesh rose up through the ranks to become one of the greatest commanders of his age, and a dragon-slaying specialist. For this, he earned the nickname Shadowsword, along with a legendary reputation for leaving death in his wake.