This is primarily intended to provide a Charisma alternate for Arcane Trickster. It’s probably also fairly easy to convert to an alternate Eldritch Knight.

Many individuals with the blood of supernatural creatures in their family trees or who were invested with a surge of chaotic energy become sorcerers, able to unleash titanic magics. Others are less robust in their expression of these powers. They gain a few useful tricks from their magic-infused blood, but not enough to see them through life. They tend to express signs of their powers, either obviously in their appearance or in the inexplicable accidents that happen around them as they grow up. They, in short, are frequently forced out and must turn to a life of crime, or at least an upbringing on the fringes. Adventuring is often the only way they can be accepted in society, for as accepted as adventurers are.

Spellcasting

When you reach 3rd level, you gain the ability to cast spells.

Cantrips. You learn three cantrips based upon your mutations (see below). You learn another cantrip at 9th level when you gain your latent mutation (see below).

Spell Slots. You gain spell slots as an Arcane Trickster.

Spells Known of 1st-Level and Higher. You know three 1st-level spells. The Spells Known column of the Arcane Trickster Spellcasting table shows when you learn more spells of 1st level or higher. Each of these spells must be drawn from your personal spell list based upon your mutations (see below) or the spells available to all mutants because they are Hated and Feared (see below).

Whenever you gain a level in this class, you can replace one of the mutant spells you know with another spell of your choice from your personal spell list. The new spell must be of a level for which you have spell slots.

Spellcasting Ability. Charisma is your spellcasting ability for your mutant spells, since they are produced from your innate magical energy. You use your Charisma whenever a spell refers to your spellcasting ability. In addition, you use your Charisma modifier when setting the saving throw DC for a mutant spell you cast and when making an attack roll with one.

Spell save DC = 8 + your proficiency bonus + your Charisma modifier

Spell attack modifier = your proficiency bonus + your Charisma modifier

Primary Mutations

Starting at 3rd level, you gain three mutations. Each mutation grants you a permanent special ability, a cantrip, and a list of spells that you may add to your personal spell list when selecting spells known.

Mutation Special Ability Cantrip Spells (1st, 2nd, 3rd, 4th)
Ceraunokinitic Resist Thunder Thunderclap (XGE) Thunderwave, Shatter, Thunder Step (XGE), Storm Sphere (XGE)
Clairvoyant Gain Expertise in Investigation, Perception, or Stealth True Strike Detect Magic, Darkvision, Clairvoyance, Locate Creature
Communicative Gain Expertise in Insight or Perception Message Comprehend Languages, Detect Thoughts, Tongues, Divination
Constructive Gain Expertise in all tools with which you are proficient Mending Mage Armor, Enhance Ability, Protection from Energy, Fabricate
Cryokinetic Resist Cold Ray of Frost Ice Knife (XGE), Shatter*, Sleet Storm, Ice Storm
Dimensional Gain Expertise in Deception, Performance, or Sleight of Hand Prestidigitation Feather Fall, Blur, Blink, Banishment
Dominant Gain Expertise in Deception, Intimidate, or Persuasion Friends Charm Person, Suggestion, Enemies Abound (XGE), Charm Monster (XGE)
Electrokinetic Resist Lightning Shocking Grasp Witch Bolt, Misty Step*, Lightning Bolt, Dimension Door*
Entropic Resist Acid Acid Splash Chromatic Orb, Knock, Dispel Magic, Polymorph
Illusory Gain Expertise in Intimidation, Performance, or Stealth Minor Illusion Silent Image, Invisibility, Major Image, Greater Invisibility
Immune Resist Force Blade Ward Shield, Mirror Image, Counterspell, Stoneskin
Luminous Resist Radiant Light Magic Missile, See Invisibility, Daylight, Sickening Radiance (XGE)
Mesmeric Resist Psychic Dancing Lights Color Spray, Hold Person, Hypnotic Pattern, Confusion
Nightmarish Resist Necrotic Chill Touch Ray of Sickness, Blindness/Deafness, Fear, Blight
Pyrokinetic Resist Fire Fire Bolt Burning Hands, Scorching Ray, Fireball, Wall of Fire
Telekinetic Gain Expertise in Athletics or Acrobatics Mage Hand Jump, Levitate, Fly, Freedom of Movement
Turbulent Resist Poison Poison Spray Fog Cloud, Gust of Wind, Stinking Cloud, Vitriolic Sphere (XGE)

* Change the energy type and trappings of these spells to match the overall energy type of the mutation (e.g., Misty Step has you teleport on a line of electricity).

It is highly suggested that you pick a suite of mutations that point to a particular origin. For example:

  • Aberrant: Communicative, Dominant, Mesmeric, Turbulent
  • Celestial: Communicative, Constructive, Dimensional, Luminous
  • Draconic: Dominant, Immune, Telekinetic, (Cryokinetic, Electrokinetic, Entropic, Pyrokinetic, or Turbulent based on dragon color)
  • Elemental: Ceraunokinetic, Dimensional, Luminous (Constructive, Cryokinetic, Pyrokinetic, or Turbulent based on elemental type)
  • Fey: Constructive, Dimensional, Illusory, Mesmeric
  • Fiendish: Cryokinetic, Electrokinetic, Pyrokinetic, Turbulent
  • Undead: Dimensional, Entropic, Immune, Nightmarish

If your race or other source already grants you a resistance you’d gain from one of these mutation types, work with your DM to replace it with an appropriate expertise.

Hated and Feared

Starting at 3rd level, elements of your mystical heritage become readily apparent. Work with your DM to develop a particular mystical signature or physical stigma that calls attention to you in civilized lands. You have disadvantage on Charisma (Persuasion) checks to interact with the superstitious unless you go to great pains to hide your heritage, but you gain advantage on Charisma (Intimidation) checks against the same kind of individuals.

You may also add the following 1st-level spells to your personal spell list from which you can choose Spells Known. They are general magics that all mutants seem to have access to, in order to hide and protect themselves from a world that hates and fears them: Absorb Elements (XGE), Chaos Bolt (XGE), Disguise Self, Expeditious Retreat, False Life.

Latent Mutation

Starting at 9th level, you gain a fourth mutation. You immediately gain the cantrip and special ability of that mutation, and may add its spells to your personal spell list.

Emissary

At 13th level, your mutation has progressed to the point that your progenitors recognize you as one of them, and you also have standing among the mutant community. You have advantage on Charisma checks when dealing with other mutants, and when dealing with the creature type of your origin. Creature types of your origin will tend to treat you as a peer or relative rather than a threat upon first encounter.

Omega Class

At 17th level, you may use the Empowered Spell and Heightened Spell metamagic abilities of the Sorcerer class. You have sorcery points equal to your Charisma modifier, and you recover to full sorcery points upon taking a long rest.

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