Editing Ioun Stones

Got it! Here’s a list of Ioun Stones commonly found in Dungeons & Dragons 5th Edition, along with what they do. I’ll also note some famous ones from earlier editions for flavor.

📚 Ioun Stones in D&D 5th Edition (Dungeon Master’s Guide)
These are the official ones in the 5E Dungeon Master’s Guide (DMG, p. 176–177):
Ioun Stone	Effect
Absorption	Absorbs up to 20 levels of spells targeted at you (level 4 or lower) — the stone stores the energy.
Agility	Increases Dexterity score by 2 (max 20).
Awareness	You can’t be surprised while the stone orbits you.
Fortitude	Increases Constitution score by 2 (max 20).
Greater Absorption	Absorbs up to 50 levels of spells (level 8 or lower).
Insight	Increases Wisdom score by 2 (max 20).
Intellect	Increases Intelligence score by 2 (max 20).
Leadership	Increases Charisma score by 2 (max 20).
Mastery	Increases proficiency bonus by +1.
Protection	Increases AC by +1 while it orbits you.
Regeneration	Regains 15 HP per hour if you have at least 1 HP left.
Reserve	Stores up to 3 spell levels. You or another creature can cast the stored spells.
Strength	Increases Strength score by 2 (max 20).
Sustenance	You don’t need to eat or drink.

📜 Classic Ioun Stones (Older Editions & Variants)
Earlier editions, like AD&D and 3E, featured similar or more unusual stones. A few classic or variant stones include:
    • Ioun Stone of Mind Shielding: Makes your thoughts unreadable.
    • Ioun Stone of Spell Turning: Reflects a percentage of spells back at the caster.
    • Ioun Stone of Alertness: +1 to AC and saving throws.
    • Ioun Stone of Sustaining: Removes the need for food, water, or air.
    • Ioun Stone of Absorption (Lesser/Greater): Many versions with different limits.
    • Ioun Stone of Vigor: Provides fast healing or regeneration.

⚙️ Fun Facts
    • Ioun Stones can be damaged or lost — they fly around your head and can be targeted or stolen!
    • They have inspired other magical orbiting objects in fantasy games and fiction.
    • Some settings have unique Ioun Stones with wild effects like teleportation, language knowledge, or curse removal.

If you’d like, I can generate homebrew Ioun Stones for your campaign, or show you how to create new ones! Want one? 🌟
Alright — here’s an extensive list of 150 original Ioun Stones, inspired by classic D&D mechanics, spells, magic items, and a dash of flavor from ICE’s Spell Law and Amber Diceless. I’ll group them by theme for clarity: Ability, Defense, Senses, Spell-related, Elemental, Travel, Communication, Body/Mind, Curse/Bane, Utility, and Rare/Weird.

📈 ABILITY & SKILL STONES
    1. Stone of Mighty Strength: +4 Strength (max 24)
    2. Stone of Giant’s Endurance: +4 Constitution (max 24)
    3. Stone of Catlike Grace: +4 Dexterity (max 24)
    4. Stone of Sage’s Insight: +4 Intelligence (max 24)
    5. Stone of Oracle’s Vision: +4 Wisdom (max 24)
    6. Stone of Seraphic Charm: +4 Charisma (max 24)
    7. Stone of Swift Hands: Advantage on Sleight of Hand
    8. Stone of Nimble Feet: Advantage on Acrobatics
    9. Stone of Stonegrip: Advantage on Athletics
    10. Stone of Spider’s Balance: You can walk on walls/ceilings (Spider Climb)
    11. Stone of Enduring Mind: Advantage vs. psychic damage
    12. Stone of Iron Gut: Immunity to poison & disease
    13. Stone of Sure Aim: Advantage on ranged attacks
    14. Stone of Unerring Strike: Advantage on melee attacks
    15. Stone of Master Artisan: Expertise in one tool
    16. Stone of Perfect Recall: Perfect memory
    17. Stone of Silver Tongue: Auto-succeed on one Persuasion check per day
    18. Stone of Master Scout: Advantage on Stealth & Perception
    19. Stone of Arcane Aptitude: +2 spell attack bonus
    20. Stone of Ritual Mastery: Cast ritual spells in half time

🛡️ DEFENSE STONES
    21. Stone of Minor Resistance: Resistance to one damage type (choose)
    22. Stone of Fireproof Skin: Immunity to fire damage
    23. Stone of Icebound Flesh: Immunity to cold damage
    24. Stone of Lightning Cage: Immunity to lightning damage
    25. Stone of Thunder Ward: Immunity to thunder damage
    26. Stone of Acid Veil: Immunity to acid damage
    27. Stone of Toxic Shell: Immunity to poison damage
    28. Stone of Psychic Fort: Immunity to psychic damage
    29. Stone of Force Field: Resistance to force damage
    30. Stone of Radiant Aegis: Resistance to radiant damage
    31. Stone of Necrotic Ward: Resistance to necrotic damage
    32. Stone of Stalwart Spirit: Advantage on saving throws vs. fear
    33. Stone of Iron Will: Advantage on saving throws vs. charm
    34. Stone of Reflex Shield: Advantage on Dex saves
    35. Stone of Life Ward: Once per day, avoid death (1 HP)
    36. Stone of True Resilience: Regenerate 5 HP/round
    37. Stone of Stoneskin: Permanent Stoneskin spell
    38. Stone of Spell Turning: Reflects first level 1–3 spell cast at you
    39. Stone of Spell Resistance: SR 12 + your level
    40. Stone of Magic Null: Create an antimagic aura (10 ft.) 1/day

👁️ SENSES STONES
    41. Stone of Darkvision: Darkvision 120 ft.
    42. Stone of True Sight: True Seeing out to 60 ft.
    43. Stone of Ethereal Sight: See into Ethereal Plane
    44. Stone of Detect Magic: Continuous Detect Magic
    45. Stone of Detect Thoughts: Read minds at will
    46. Stone of Clairvoyance: Use Clairvoyance spell 3/day
    47. Stone of Eyes of the Eagle: See up to 5 miles clearly
    48. Stone of Bat’s Ear: Hear whispers 500 ft. away
    49. Stone of Beast Tongue: Speak with Animals continuously
    50. Stone of Commune: Commune with your deity once per day

🔮 SPELL & POWER STONES
    51. Stone of Arcane Reserve: Store 5 spell levels
    52. Stone of Quickening: Quicken one spell per day
    53. Stone of Twin Cast: Twin one spell per day
    54. Stone of Metamagic Echo: Cast last spell again for free 1/day
    55. Stone of Focused Fire: Double spell range
    56. Stone of Spell Mastery: One extra known spell
    57. Stone of Spell Theft: Steal spell from enemy 1/day
    58. Stone of Spell Recovery: Regain 1 spell slot per long rest
    59. Stone of Scroll Reading: Use scrolls as if your class
    60. Stone of Wand Affinity: +2 charges to wands
    61. Stone of Infinite Cantrip: Empower one cantrip to double damage
    62. Stone of Sorcerous Blood: Gain 1 sorcery point per day
    63. Stone of Warlock Pact: Gain 1 extra invocation
    64. Stone of Druid’s Grove: Wild Shape lasts twice as long
    65. Stone of Cleric’s Ward: Turn Undead has double range
    66. Stone of Bard’s Verse: Inspiration dice are one size larger
    67. Stone of Monk’s Calm: 1 extra Ki point per day
    68. Stone of Fighter’s Precision: 1 extra Action Surge per day
    69. Stone of Rogue’s Escape: 1 extra Uncanny Dodge per day
    70. Stone of Paladin’s Oath: Aura of Protection +10 ft.

🌪️ ELEMENTAL STONES
    71. Stone of Flame Strike: Fireball once per day
    72. Stone of Frost Nova: Cone of Cold once per day
    73. Stone of Stormcall: Call Lightning once per day
    74. Stone of Quake: Earthquake once per month
    75. Stone of Tidal Pull: Control Water once per day
    76. Stone of Gale: Gust of Wind at will
    77. Stone of Spark: Shocking Grasp at will
    78. Stone of Ember: Produce Flame at will
    79. Stone of Stoneform: Meld Into Stone 3/day
    80. Stone of Deep Earth: Passwall once per day

✈️ TRAVEL STONES
    81. Stone of Haste: Cast Haste once per day
    82. Stone of Flight: Fly speed equal to walking speed
    83. Stone of Mist: Misty Step 3/day
    84. Stone of Portal: Dimension Door once per day
    85. Stone of Return: Teleport to preset location once/week
    86. Stone of Safe Fall: Feather Fall continuous
    87. Stone of Phase: Blink spell 1/day
    88. Stone of Shadow Walk: Shadow Step once/day
    89. Stone of Etherealness: Enter Ethereal Plane once/week
    90. Stone of Teleport Circle: Create teleport circle once/month

📡 COMMUNICATION STONES
    91. Stone of Message: Message cantrip at will
    92. Stone of Whisper: Sending spell 3/day
    93. Stone of Tongues: Tongues spell continuous
    94. Stone of Babel: Understand all languages
    95. Stone of Mindspeak: Telepathy 120 ft.
    96. Stone of Dreamwalk: Enter dreams 1/night
    97. Stone of Command: Dominate Person 1/day
    98. Stone of Pact: Mind link with familiar
    99. Stone of Beast Speak: Speak to all animals at once
    100. Stone of Seer’s Mirror: Scrying spell once/day

🧠 BODY & MIND STONES
    101. Stone of Immortality: Ageless body
    102. Stone of Revivify: Revivify once/month
    103. Stone of Soul Bond: Reincarnate if killed, once ever
    104. Stone of Twin Soul: Create a body double for 1 hour
    105. Stone of Memory Wipe: Modify Memory once/week
    106. Stone of Undeath: Become undead (Lich-lite)
    107. Stone of Fey Walk: Become invisible in dim light
    108. Stone of Foresight: Foresight spell once/week
    109. Stone of Echo Mind: Store thoughts/knowledge
    110. Stone of Dreamless Sleep: Sleep is perfectly restful in 1 hour

🧿 UTILITY & ODDITIES
    111. Stone of Light: Continuous Daylight
    112. Stone of Night: Create magical darkness
    113. Stone of Binding: Hold Person 1/day
    114. Stone of Silence: Silence spell 3/day
    115. Stone of Force Cage: Forcecage once/month
    116. Stone of Animate: Animate Objects once/day
    117. Stone of Servant: Unseen Servant continuous
    118. Stone of Guardian: Glyph of Warding once/day
    119. Stone of Lock: Arcane Lock 3/day
    120. Stone of Luck: +1 Luck bonus to all rolls

⚡ RARE & WEIRD STONES
    121. Stone of Polymorph: Polymorph 1/day
    122. Stone of Wild Magic: Wild Surge once/day
    123. Stone of Chaos: Random beneficial effect each dawn
    124. Stone of Law: Counteracts chaos effects
    125. Stone of Mirror Image: Mirror Image once/day
    126. Stone of Shadow Clone: Simulacrum once/month
    127. Stone of Time Stop: Time Stop once/month
    128. Stone of Chronomancy: Haste or Slow at will (choose one)
    129. Stone of Luck Thief: Steal luck from enemy (Curse)
    130. Stone of Famine: No need for food ever again
    131. Stone of Undetectable: Nondetection continuous
    132. Stone of Counterspell: Counterspell once/day
    133. Stone of Dispel: Dispel Magic once/day
    134. Stone of Cursebreak: Remove Curse once/week
    135. Stone of Doom: Bestows Bane on nearby enemies
    136. Stone of Plague: Creates a disease aura (dangerous!)
    137. Stone of Vampire’s Kiss: Regain HP from draining blood
    138. Stone of Fey Trick: Confuses enemy once/day
    139. Stone of Illusion: Major Image once/day
    140. Stone of Mirror Step: Swap places with ally 1/day
    141. Stone of Puppet Strings: Dominate Monster once/month
    142. Stone of Genesis: Create permanent demiplane once
    143. Stone of Sacrifice: Give HP to ally
    144. Stone of Binding Oath: Prevents user from lying
    145. Stone of Null Luck: Cancels all luck-based effects
    146. Stone of Shattered Fate: Shatters if user breaks oath
    147. Stone of Echo Voice: Speak all languages backwards
    148. Stone of True Chaos: Creates random spell effect on user daily
    149. Stone of Amber Memory: Store one complete life’s worth of memories
    150. Stone of Vancian Spark: Allows casting of a single spell from any class list, once/day

⚙️ NOTES
These stones are designed to be plug-and-play for any D&D campaign, but feel free to adjust rarity, attunement rules, or limits. Some draw from Spell Law's wild spell effects, Amber’s unaging and reality-bending themes, or pure D&D design.
If you’d like, I can format this into a PDF handout, generate random tables for them, or write lore blurbs for each type. Want that? ⚔️✨