Spell scroll

A spell scroll is a roll of parchment sometimes attached to wooden rods, and typically kept safe in a scroll case. It contains the magic of a single spell, arcane incantation written in a "mystical cipher" to summon it, and the spell scroll itself is treated as a material component for its realization, doesn't requiring the caster to provide any material components.

Description
To unleash the magic contained in a spell scroll, any creature that can understand a written language can read the arcane script on a scroll can attempt to use their action to read the scroll. The spell must be from their class's spell list, otherwise, the scroll is unintelligible. Casting the spell by reading the scroll requires the spell's normal casting time. Once the spell is cast, the words on the scroll fade, and it crumbles to dust. If the casting is interrupted, the scroll is not lost.

If the spell is from the caster class's spell list but of a higher level than they can normally cast, the caster must make an ability check using their spellcasting ability to determine whether they cast it successfully. The DC equals 10 + the spell's level. On a failed check, the spell disappears from the scroll with no other effect.

The level of the spell on the scroll determines the spell's saving throw DC and attack bonus, as well as the scroll's rarity, as shown in the spell scroll table below.

Copying process
A wizard spell of 1st level or higher can be copied from a spell scroll to the wizard's spellbook if the wizard have spell slots equal to the spell level. To copy a spell, the wizard must make a successfull Intelligence (Arcana) check with a DC equal to 10 + the spell's level. Whether the check succeeds or fails, the spell scroll is destroyed.

Copying a spell into the spellbook involves reproducing the basic form of the spell, then deciphering the unique system of notation used by the wizard who wrote it. They must practice the spell until they understand the sounds or gestures required, then transcribe it into their spellbook using their own notation. For each level of the spell, the process takes 2 hours and costs 50 gold pieces. The cost represents material components the wizard expend as the wizard experiment with the spell to master it, as well as the fine inks they need to record it. Once the wizard has spent this time and money, they can prepare the spell just like their other spells.

One-shots

 * Tary used his scroll of Fire Shield he bought from Cidrick Gillsman in Vasselheim.
 * Gryffin Earandil had Feather Fall spell scroll, but had no opportunity to use it.
 * During their non-canon adventures with Lucky Jack, Beau and Yasha found a spell scroll of Dispel Magic.

Trivia
The 5th edition Dungeon Master's Guide has a scroll mishaps table with varios aftermath effects for the creatures who failed to cast the spell from a spell scroll and failed a DC 10 Intelligence saving throw thereafter.