Spell Scrolls for Everyone

Normally, you can only use a Spell Scroll if you have spell slots of the same level as the Spell Scroll, and if the spell is on your class list. These rules are intended to provide more flexibility for those who fall outside of these bounds.

1. If the spell is on the character's class spell list, and it is a level they can cast, they can cast it.
2. If the spell is on a character's class spell list, but is a higher level than they can cast, they can attempt to cast it by making an Intelligence Check with a DC of 10 + the spell's level.
3. If the character is a spell caster, but the spell is not on their class spell list, they can attempt to cast the spell by making an Intelligence Check vs DC 10 + the spell's level with disadvantage. If the check fails, the spell fails and they must make a scroll mishap check as per the variant rule in the DMG. (DC 10 Intelligence Saving Throw). On a failed save, they roll on the mishap table in the DMG.
4. If the character is not a spell caster, they can attempt to cast the spell from the scroll with an Intelligence Check vs DC 10 + the spell's level with disadvantage. If the check fails, the spell fails and they must make a scroll mishap check as per the variant rule in the DMG. (DC 10 Intelligence Saving Throw). On a failed save, they roll on the mishap table in the DMG.