The Veil of Forgotten Truths

Details the history of something called the Ritual Primeval and the 27 "primal children of creation" whose sacrifice is needed to shape the creation of a new demiplane. Includes a fragment of text to be chanted during invocation of the ritual: "Cast well, cast wise, for natures near, be evil or lucky or good, be chaos or dreams or trickery, make your wish understood."

Among the text are pages that function as a spell scroll...

Creation
5th-level illusion

Casting Time: 1 minute
Range: 30 feet
Duration: Special

You pull wisps of shadow material from the Shadowfell to create a nonliving object of vegetable matter within 'range': soft goods, rope, wood, or something similar. You can also use this spell to create mineral objects such as stone, crystal, or metal. The object created must be no larger than a 5-foot cube, and the object must be of a form and material that you have seen before.

The duration depends on the object's material. If the object is composed of multiple materials, use the shortest duration:
Vegetable matter ... 1 day
Stone or crystal ... 12 hours
Precious metals ... 1 hour
Gems ... 10 minutes
Adamantine or mithral ... 1 minute

Using any material created by this spell as another spell's material component causes that spell to fail.

---

SPELL SCROLL RULES (DMG p. 200)

When using a spell scroll, the spell must be on a caster's class spell list to use as an action (no need to provide any spell's components). Otherwise, the scroll is unintelligible.

If the spell is on a character's class spell list but of a higher level than can normally be cast, the character must make an ability check using the usual class-related spellcasting ability (Intelligence, Wisdom, or Charisma) to determine whether it is cast successfully. The DC equals 10 + spell's level. On a failed check, the spell disappears from the scroll with no other effect.

REQUIRED SPELLCASTING ABILITY CHECK
* Cantrip (Common) ... DC 10
* 1st Level Spell (Common) ... DC 11
* 2nd Level Spell (Uncommon) ... DC 12
* 3rd Level Spell (Uncommon) ... DC 13
* 4th Level Spell (Rare) ... DC 14
* 5th Level Spell (Rare) ... DC 15
* 6th Level Spell (Very rare) ... DC 16
* 7th Level Spell (Very rare) ... DC 17
* 8th Level Spell (Very rare) ... DC 18
* 9th Level Spell (Legendary) ... DC 19

Once the spell is cast, the words on the scroll fade, and those pages within the book fall out as dust.