One thing that is missing at first glance is a key point for each faction : what do they want ?
Power is not an answer, because power, it and of itself, gives you nothing but a tool to do something else. If you don't want something, power is useless.

If a faction has everything it wants, then there is no conflict.

And, as I GM, you want conflict between factions. You want a dynamic power struggle, so that your PCs are immersed in it and either pick a side (and live with it) or stay clear and suffer the consequences. You want factions who are looking for allies and enemies, who provide hooks for adventures because these adventures further their goals.

You might also want to define a number of concepts further - such as "harmony", "forbidden knowledge/magic/rituals", and the like. Who defines what is harmonious and what is not ? Who decides what is forbidden ?

Fleshing out might also require to sketch out sub-factions (internal politics). Individuals are not robots, they have their own goals - their own wants. If they are members of a faction, their own wants might align with those of the faction as a whole but might diverge on the details, or they might see the faction goals as a means to their own end.

And keep in mind the common folk - all those factions need people to feed them. People always have an opinion on those who wield power, and that opinion can be based on positive or negative emotions (gratitude ? envy ? fear ?). Are there people who would like to be part of those in power but can't ? People who resent them because of their power and what they did with it ?

You want conflict.

The following is a starting point for a number of new magic guilds I intend to use in the rpg setting. This information was generated with the help of Chat GPT in about an hours work. Considerably faster than I could have done it on my own. These factions still need some more fleshing out, for example I am still searching for the sigil art, NPC art and  afew maps for key locations in the city where the factions are based. Interested in hearing if other GMs are using AI to support their world building and as a tool to cut down on prep.

The Astral Syndicate: A secretive group of powerful illusionists and telepaths who manipulate perceptions and dreams. They control information flow within the city, using their abilities to spy on residents and maintain their influence over politics and commerce. Rumors abound that they possess forbidden knowledge of astral projection and mind control.

The Elemental Masters: Masters of elemental magic who draw their power from the natural forces surrounding the floating city. Each member specializes in harnessing a specific element—earth, air, fire, or water—and they are responsible for maintaining the city's magical infrastructure. However, their rigid adherence to their elemental principles often leads to conflicts with other factions.

The Artificers Guild: Inventors and craftsmen who create magical artifacts and constructs to serve the city's needs. They are highly sought after for their ability to imbue objects with powerful enchantments, but their creations often have unintended consequences. Some suspect the guild of dabbling in forbidden magic to achieve their results.

The Shadowstorm Nexus: A clandestine group of necromancers and dark sorcerers who tap into the power of the Shadow World itself. They operate in the shadows, practicing forbidden rituals and experimenting with the forces of undeath. Many fear their influence, believing that their ultimate goal is to plunge the floating city into darkness and chaos.

The Celestial Sanctum: Mystical scholars and seers who study the cosmic energies that govern the universe. They believe in the balance of light and darkness and seek to maintain harmony within the floating city. While they are often seen as aloof and enigmatic, their wisdom is highly valued, and many seek their guidance in matters of prophecy and fate.

Each of these factions offers opportunities for intrigue, conflict, and adventure.



The Astral Syndicate:
Leader's Name: Miralyn Starweaver

The Elemental Masters:
Leader's Name: Thalorin Stormcaller

The Artificers Guild:
Leader's Name: Archmagus Arcturus Forgeheart

The Shadowstorm Nexus:
Leader's Name: Malakar Voidwalker

The Celestial Order:
Leader's Name: Elara Sunseeker



The Astral Syndicate:
God of Worship: Lyra, the Goddess of Illusion and Dreams.
Benefits for Initiates: Initiates gain access to training in advanced illusion magic, telepathy, and mind manipulation techniques. They also receive mentorship from senior members and access to the Syndicate's extensive network of information.
Skills Mastery: Illusion Casting, Mind Reading, Telepathy, Stealth, Perception.
Sigil: A swirling pattern of stars and nebulae, representing the manipulation of perceptions and dreams.
Spell Lists: Illusions, Mentalism, Mind Mastery.

The Elemental Masters:
God of Worship: Aetherius, the Elemental Primordial.
Benefits for Initiates: Initiates receive training in elemental magic, attunement to one of the four elements (earth, air, fire, water), and the ability to commune with elemental spirits. They also gain access to the Keepers' vaults of ancient knowledge.
Skills Mastery: Elemental Magic, Elemental Lore, Elemental Control, Elemental Summoning, Alchemy.
Sigil: A stylized representation of the four classical elements intertwined in a circular motif.
Spell Lists: Essence Manipulation, Elementalism, Elemental Summons.

The Artificers Guild:
God of Worship: Hephaestus, the God of Craftsmanship and Invention.
Benefits for Initiates: Initiates receive training in arcane crafting, enchantment techniques, and the creation of magical constructs. They also gain access to the guild's workshops and resources.
Skills Mastery: Enchantment, Artifice, Runecrafting, Artisanry, Arcane Lore.
Sigil: An intricate rune encompassed within a gear, symbolizing the fusion of magic and technology.
Spell Lists: Artifice, Rune Mastery, Constructs.

The Shadowstorm Nexus:
God of Worship: Nihilus, the God of Darkness and Decay.
Benefits for Initiates: Initiates gain knowledge of forbidden magic, necromancy, and shadow manipulation. They also receive protection from the cabal's enemies and access to secret libraries of dark lore.
Skills Mastery: Necromancy, Shadow Magic, Forbidden Knowledge, Stealth, Assassination.
Sigil: A twisted, serpentine shape engulfed in darkness, representing the manipulation of shadows and death.
Spell Lists: Necromancy, Shadow Mastery, Dark Summonings.

The Celestial Order:
God of Worship: Selene, the Goddess of Light and Wisdom.
Benefits for Initiates: Initiates receive training in celestial magic, divination, and spiritual enlightenment. They also gain access to the order's celestial observatory and guidance from the order's sages.
Skills Mastery: Divination, Celestial Magic, Healing, Meditation, Lore.
Sigil: A radiant sun surrounded by stars, symbolizing enlightenment and cosmic balance.
Spell Lists: Celestial Magic, Divination, Healing.

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That is a super cool project! Those images are quite high quality.

It's covered in the description of charged items in section 3.3.