An Ioun stone is named after Ioun, a god of knowledge and prophecy revered on some worlds. Many types of Ioun stone exist, each type a distinct combination of shape and color. When you use an action to toss one of these stones into the air, the stone orbits your head at a distance of 1m and confers a benefit to you. Thereafter, another creature must use an action to grasp or net the stone to separate it from you, either by making a successful attack roll against AC 24 or a successful DC 24 Dexterity (Acrobatics) check. You can use an action to seize and stow the stone, ending its effect. A stone has AC 24, 10 hit points, and resistance to all damage. It is considered to be an object that is being worn while it orbits your head.
| # | Name | Description |
| 1 | Absorption (Very Rare) | While this pale lavender
ellipsoid orbits your head, you can use your reaction to
cancel a spell of 4th level or lower cast by a creature you
can see and targeting only you.
Once the stone has canceled 20 levels of spells, it
burns out and turns dull gray, losing its magic. If you
are targeted by a spell whose level is higher than the
number of spell levels the stone has left, the stone can't
cancel it. |
| 2 | Agility (Very Rare) | Your Dexterity score increases by
2, to a maximum of 20, while this deep red sphere orbits
your head. |
| 3 | Awareness (Rare) | You can't be surprised while this
dark blue rhomboid orbits your head |
| 4 | Fortitude (Very Rare) | Your Constitution score
increases by 2, to a maximum of 20, while this pink
rhomboid orbits your head. |
| 5 | Greater Absorption (Legendary) | While this marbled
lavender and green ellipsoid orbits your head, you can
use your reaction to cancel a spell of 8th level or lower
cast by a creature you can see and targeting only you.
Once the stone has canceled 50 levels of spells, it
burns out and turns dull gray, losing its magic. If you
are targeted by a spell whose level is higher than the
number of spell levels the stone has left, the stone can't
cancel it. |
| 6 | Insight (Very Rare) | Your Wisdom score increases
by 2, to a maximum of 20, while this incandescent blue
sphere orbits your head. |
| 7 | Intellect (Very Rare) | Your Intelligence score
increases by 2, to a maximum of 20, while this marbled
scarlet and blue sphere orbits your head. |
| 8 | Leadership (Very Rare) | Your Charisma score
increases by 2, to a maximum of 20, while this marbled
pink and green sphere orbits your head. |
| 9 | Mastery (Legendary) | Your proficiency bonus
increases by 1 while this pale green prism orbits
your head. |
| 10 | Protection (Rare) | You gain a +1 bonus to AC while
this dusty rose prism orbits your head. |
| 11 | Regeneration (Legendary) | You regain 15 hit points
at the end of each hour this pearly white spindle orbits
your head, provided that you have at least 1 hit point. |
| 12 | Reserve (Rare) | This vibrant purple prism stores
spells cast into it, holding them until you use them. The
stone can store up to 3 levels worth of spells at a time.
When found, it contains 1d4 - 1 levels of stored spells
chosen by the DM.
Any creature can cast a spell of 1st through 3rd level
into the stone by touching it as the spell is cast. The
spell has no effect, other than to be stored in the stone.
If the stone can't hold the spell, the spell is expended
without effect. The level of the slot used to cast the spell
determines how much space it uses.
While this stone orbits your head, you can cast any
spell stored in it. The spell uses the slot level, spell save
DC, spell attack bonus, and spellcasting ability of the
original caster, but is otherwise treated as if you cast the spell. The spell cast from the stone is no longer stored in
it, freeing up space. |
| 13 | Strength (Very Rare) | Your Strength score increases
by 2, to a maximum of 20, while this pale blue rhomboid
orbits your head. |
| 14 | Sustenenace (Rare) | You don't need to eat or drink
while this clear spindle orbits your head. |