Pushing the Boundaries

Flux Adepts are all generally compelled by the same goal: to push their bodies to the limit, and beyond even that. They eschew exercise and physical training as methods to grow strong; after all, even that can only get you so far. The true path to power is by molding your flesh as you will it. A Flux Adept views the body not as a tool, but as a raw material to be shaped into something more.

Proud but wary

Due to their trafficking in blood and bone, many view the Flux Adept as little more than necromancers, though this is far from true. Most Flux Adepts will be quick to point out that their studies concern the living first and foremost (though some less scrupulous among them may acquire their material from the dead). Other, more educated folk see them as lunatics, trying to force their bodies to do things they were never meant to, regardless of the dangers inherent in molding your own flesh. A Flux Adept is rarely ashamed of his studies, but most have learned to be discreet, lest they be run out of town by closed-minded citizens.

Creating a Flux Adept

When creating a Flux Adept, it is important to consider why your character decided to become an Adept. Were they a wizard that grew tired of their physical frailty? Were they a fighter, seeking some way to give themselves an edge in combat? Or were they simply intrigued by the idea of pushing their physical form beyond its limits?

You should also consider where or how they began studying the ways of Flux. Few academies in the world offer courses on the practice, as it is seen as particularly dangerous and distasteful to most. Your character may have studied under another Flux Adept, acquiring the techniques in a master and apprentice role, or they may have simply stumbled across a few rare tomes that detailed the theories and practices that allowed them to develop the skills on their own.

Quick Build

You can make a Flux Adept quickly by following these suggestions. First, make your highest ability score Constitution, following with Dexterity or Strength. Second, choose the Far Traveler background.

Class Features

As a Flux Adept, you gain the following class features

Spellcasting Focus

Because a Flux Adept uses magic to alter their own body, you can use your body as a spellcasting focus (see Adventuring Gear in the PHB for rules regarding spellcasting focuses). Spells cast using Flux Points ignore material costs even if a spell specifies a monetary cost.

Osteophytes

Starting when you take this Core at level 3, you can fire spurs of bone from your arms. You gain a ranged weapon attack that deals 1d6 piercing damage and has a range of 80/320. You are considered proficient with this weapon, and you add your Dexterity modifier to attack and damage rolls made with this attack. The damage dice increases to 1d8 at level 10, and 1d10 at level 15.

You can also spend 2 Flux points to cause your bone shard to explode when it reaches its target. Make a ranged weapon attack against the target. On a hit, the target takes 1d10 piercing damage. Hit or miss, the shard then explodes. The target and each creature within 5 feet of the target must succeed on a Dexterity saving throw or take 2d6 piercing damage.

Fighting Style

You adopt a particular style of fighting as your specialty. Choose one of the following options. You can't take a Fighting Style option more than once, even if you later get to choose again.

• Archery You gain a +2 bonus to attack rolls you make with ranged weapon attacks.
• Close Quarters Shooter You are trained in making ranged attacks at close quarters. When making a ranged attack while you are within 5 feet of a hostile creature, you do not have disadvantage on the attack roll. Your ranged attacks ignore half cover and three-quarters cover against targets within 30 feet of you. Finally, you have a +1 bonus to attack rolls on ranged attacks.

Calcification

At level 5, an Osteomancer learns to pour more arcane energy into their bones, allowing them to manifest a set of exoskeletal armor. You have a natural AC of 9 + your Dexterity modifier + your Constitution modifier.

In addition, you can extend hooks and barbs from your feet and palms, allowing you to scale vertical surfaces. You gain a climbing speed equal to your movement speed.

Seize the Core

Eventually, an Osteomancer learns to control the bones of other living creatures, as well as his own. Starting at Level 9, you can spend 2 Flux points as an action to force a creature you can see within 120 ft to make a Constitution saving throw against your Flux Save DC. On a failed save, the target must move up to its speed in a direction you choose. In addition, you can cause the target to drop whatever it is holding. If you attempt to make the creature move into obvious danger, it can make another Constitution saving throw to break the effect. This feature can only target creatures with a skeleton.

Arcane Ossification

Also at level 9, the bones created by your Osteophyte feature count as magical for the purpose of overcoming resistance and immunity to nonmagical attacks and damage.

Rain of Bones

At level 11, an Osteomancer can exert their arcane power to create a multitude of bone spurs at once. You can expend 4 Flux points to cast Conjure Barrage. In addition, you can use your action to make a ranged attack against any number of creatures within 10 feet of a point you can see within your Osteophyte's range. You make a separate attack roll for each target.

Exoskeletal Growth

At Level 15, you can spend 6 Flux points to cast Conjure Volley. In addition, you can cast Stoneskin for 5 Flux points. You have learned to produce so many bones that you can plate your body with them, or call down a storm of bones on your enemies heads.

Osteophage

Upon reaching level 20, an Osteomancer has mastered the ability to not only strengthen their own core, but destroy another's. You can spend 9 Flux points to cast Harm, but can only affect a creature that has bones. In addition, your target gains a vulnerability to bludgenoning damage, as their bones become brittle and frail.

Bonus Proficiencies

When you choose this Flux Core at 3rd level, you gain proficiency with Medium and Heavy Armor and Exotic weapons.

Hematic Armory

A Sanguinomancer's primary armament is their own blood. Beginning at level 3, you can spend a short rest to dissolve a melee weapon into your blood, storing it for later use. The weapon is destroyed during this process, and once it's finished you can create a copy of the weapon out of your blood as a bonus action.

The copy maintains any enchantments the original weapon had, but you cannot copy an Artifact in this way. You cannot be disarmed of a blood weapon, but it dissolves as soon as it leaves your hand.

You can have up to two stored weapons, but can only manifest one at a time with your bonus action. If you attempt to store a third weapon, you must purge yourself of one of the other two.

Fighting Style

You adopt a particular style of fighting as your specialty. Choose one of the following options. You can't take a Fighting Style option more than once, even if you later get to choose again.

• Defense While you are wearing armor, you gain a +1 bonus to AC.
• Dueling When you are wielding a melee weapon in one hand and no other weapons, you gain a +2 bonus to damage rolls with that weapon.
• Great Weapon Fighting When you roll a 1 or 2 on a damage die for an attack you make with a melee weapon that you are wielding with two hands, you can reroll the die and must use the new roll, even if the new roll is a 1 or a 2. The weapon must have the two-handed or versatile property for you to gain this benefit.
• Two-Weapon Fighting When you engage in two-weapon fighting, you can add your ability modifier to the damage of the second attack.

Extra Attack

Beginning at 5th level, you can Attack twice, instead of once, whenever you take the Attack action on your turn.

Poikilothermic Strikes

Also at level 5, you learn to drastically alter the temperature of your blood weapon. When you successfully hit a creature with a melee attack, you can spend 2 Flux points to use one of the following features:

• Boil the Blood Your weapon ignites your opponent's blood, and the attack deals an extra 1d6 fire damage to the target and causes the target to burst into flames. At the start of each of its subsequent turns, the target must make a Constitution saving throw. On a failed save, it takes 1d6 fire damage. On a successful save, the spell ends.
• Freeze the Blood Your weapon instantly freezes the blood in your opponent's veins. The attack deals an extra 1d6 cold damage, and your opponent's speed is reduced to 10 feet until the end of its next turn.

You can spend additional Flux Points to increase the initial damage of either feature by 1d6 per Flux Point, to a maximum of 10 Flux Points.

Transfusion

At level 9, you can affect the flow of blood, using it to heal or harm. You can spend 4 Flux points to cast Life Transference or Vampiric Touch.

Hematic Enhancement

An experienced Sanguinomancer learns to channel pure arcane energy into their blood weapons. Beginning at level 11, when summoning your blood weapon, you can spend 1 Flux point to increase your attack and damage rolls with the weapon by +1. This bonus lasts until your dissolve the weapon. You can further increase the bonus by spending additional flux points, to a maximum of 3 Flux points for a +3 bonus.

Thrombocytes

Beginning at level 15, as long as you are conscious and below half your maximum HP, you gain HP at the beginning of your turn equal 5 + your Constitution modifier. Your blood coagulates quicker than most, stopping your bleeding far more quickly than normal.

Mass Phlebotomy

The most experienced Sanguinomancers have mastered the ability to draw the blood from their opponent's veins. Staring from level 20, you can spend 9 Flux points to cast Abi-Dalzim's Horrid Wilting, but it can only affect creatures with blood.

Synaptic Bolt

The first thing a Neuromancer learns is that power comes from within. Literally. Starting when you choose this Flux Core at third level, you can cause a small bolt of lightning to fire from your hand. Make a ranged spell attack against an enemy you can see within 120 ft. On a hit, the target takes 1d10 lightning damage. The number of bolts you can fire increases as you gain levels in this class: 2 bolts at level 2, three bolts at level 11, and four bolts at level 17. You can target as many enemies as you can fire bolts, making a separate attack roll for each, or you can combine bolts into a single roll, dealing 1d10 damage per bolt.

Additionally, you learn the Shocking Grasp cantrip, and can spend 2 Flux Points to cast Chromatic Orb as a first level spell , but the damage type must be Lightning.

Synaptic Burst

Starting at level 5, you learn to channel your synaptic energies in more complex manners. You can spend 2 Flux points to cast the spells Hellish Rebuke, Thunderwave, or Witch Bolt. You can spend additional Flux points to increase the casting level of these spells, at the cost of one flux point per spell slot level, up to a maximum of 6 Flux Points.

You also learn to precisely target your Synaptic Bolts, at the expense of power. You can spend 2 flux points as an action to create three darts of lightning in your hand. Each dart hits a creature of your choice that you can see within 120 feet. A dart deals 1d4+1 lightning damage to its target. The darts all strike simultaneously and you can direct them to hit one creature or several. You can create additional darts at the cost of 1 Flux point per dart.

Synaptic Strike

At level 9, you have begun to produce a prodigious amount of electricity, releasing it in targeted blasts or imbuing your weapons with power. You can spend 4 points to cast Lightning Arrow. You can increase the casting level by spending extra flux points, increasing the spell slot level by 1 for each extra Flux Point spent. You also gain the ability to spend 4 Flux points to summon 3 bolts of lightning, sending them streaking towards your choice of targets within 120 ft (you can choose one target or several). Make a ranged spell attack for each bolt. On a hit, the target takes 2d6 lightning damage. You can create additional bolts by spending additional flux points, at a rate of one bolt per flux point.

Also at level 9, you learn to redirect incoming electricity into your own attacks. You gain resistance to lightning damage, and whenever you take lightning damage you can use your reaction to spend 5 Flux points and gain immunity to lightning damage. If you do so, the first time you use a Neuromancer feature on your next turn you can add 4d6 lightning damage to the damage dealt.

Synaptic Surge

At level 11, a Neuromancer learns to release their power in one large surge. You can spend 5 points to cast Haste, targeting yourself. Also, as an action, you can spend 6 Flux points to cause a sudden wave of lightning to emanate from you. Each creature you choose within 30 feet of you must succeed on a Constitution saving throw or take 5d6 thunder damage and 5d6 lightning damage, and be knocked prone. A creature that succeeds on its saving throw takes half as much damage and isn't knocked prone.

Synaptic Storm

Beginning at Level 15, you can project a cascade of power from your body, flooding the the bodies of your opponents with electricity. You can spend 6 Flux points to cast Synaptic Static. Additionally, you can release a torrent of bioelectrical energy that leaps from foe to foe. You can spend 7 Flux points to cast Chain Lightning. You can spend additional Flux points to increase the casting level of Chain Lightning, at the cost of 1 Flux point per spell slot level.

Synaptic Overload

Eventually, a neuromancer has learned the most intimate secrets of the brain's structure, and in doing so has learned to destroy those of their opponents. Upon reaching level 20, you can spend 9 Flux Points to cast Feeblemind or Psychic Scream.