D&D 5E The Domains of Dread, listed by the power of their Dark Lord (using their CR)

[Davies]

I initially dismissed that because of the spellcasting ("(s)he perceived magic as stealing the powers of otherworldly beings and cheating the laws of nature") but ... hm. It's a possibility,

 

[Davies]

Viktra Mordenheim
Medium humanoid

Armor Class 15 (enhanced leather armor)
Hit Points 110 (17d8 +34)
Speed 30 ft
STR 10 (+0); DEX 15 (+2); CON 14 (+2); INT 20 (+5); WIS 14 (+2); CHA 15 (+2)
Saving Throws CON +6, INT +9
Skills Arcana +9, Medicine +10
Damage Resistance poison
Condition Immunity poisoned
Senses Passive Perception +2
Languages Common, Dwarven
Challenge 10 (5,900 XP)

Bolstering Presence. Mordenheim's presence strengthens any nearby constructs or modified entities if they are allied to her. Any ally* that starts its turn within 30 feet of the Doctor regains 5 (1d10) hit points.
Magic Resistance. Mordenheim has advantage on saving throws against spells and other magical effects.
SpellcastingClever Devices. Despite what she might claim, Viktra is a 16th level spellcaster, and her spellcasting ability is Intelligence (spell save DC 17, +9 to hit with spell attacks). She has the following artificer spells prepared:

Cantrips: Mending, ray of frost, shocking grasp,
1st level (4 slots): Disguise self, expeditious retreat, cure wounds
2nd level (3 slots): Darkvision, blur, see invisibility,
3rd level (3 slots): Dispel magic, haste, intellect fortress,
4th level (2 slots): Freedom of movement, summon construct

Actions:
Enhanced Scalpel: Melee Weapon Attack +7 to hit, reach 5 ft, one target: Hit 5 (1d4 +3) piercing damage.

* Viktra will only consider constructs and modified individuals of her own creation as allies, for these purposes.